terahertz spectroscopy and imaging

Low Energy Electrodynamics in Solids LEES 12

2012-03-01T00:30:00.002Z

Topics

Low-dimensional electronic systems
Dirac Materials
Unconventional superconductivity
Correlated electron systems
Metamaterials and plasmonic systems
Multilayers, surfaces, and interfaces
Carbon nanotubes, graphene, and fullerenes
Quantum phase transitions
Topological Insulators
Carbon based nanostructures
Microwave, terahertz, infrared, and optical spectroscopy
Ultrafast and nano-scale spectroscopies
and more

Organizers

Chairs

Dimitri N. Basov (UC San Diego, California, USA) dbasov@physics.ucsd.edu
Michael C. Martin (Lawrence Berkeley National Lab, Berkeley, California, USA) MCMartin@lbl.gov

Program Committee

Martin Dressel (Stuttgart)
Feng Wang (UC Berkeley)
Dirk van der Marel (Université Genève)
Toomas Room (Estonia)
Andrea Damacelli (UBC)
Andrea Cavalleri (Hamburg)
Andrey Chubukov (Wisconsin)
Junichiro Kono (Rice)
David Awschalom (UC Santa Barbara)
Rick Lobo (Paris)
Willie Padilla (Boston College)

International Advisory Committee

Christopher Homes (BNL)
David Tanner (UFL)
László Forró (Lausanne)
Joe Orenstein (LBNL)
Tom Timusk (McMaster)
Peter D. Johnson (BNL)
George Gruner (UCLA)
Rudi Hackl (Walther Meissner Institut)
Setsuko Tajima (Osaka)
Pascale Roy (Paris)
Fritz Keilmann (Munich)
Tae Won Noh (Seoul)

Important Dates

Abstracts Due: March 5, 2012
Acceptance Notification: March 23, 2012
Early Registration Deadline (reduced fee): April 23, 2012
Late Registration: Begins April 24, 2012
LEES 2012 Conference: July 22 - 27, 2012

For more information click here
http://www.lees2012.org/index.html

APS March Meeting 2012

2012-03-01T00:19:00.001Z

TeraView customers present their recent research at the American Physical Society March meeting in Boston this week

A28.00010 : Terahertz properties of Tm (Tm=Cu, Ag) doped ZnO thin films

Terahertz properties of Tm (Tm=Cu, Ag) doped ZnO thin films

MI HE, XINGQUAN ZOU, TOM WU, ELBERT CHIA

Nanyang Technological University

Abstact

Optical properties of Zn_0:95Tm_0.05O (Tm=Cu, Ag) thin films are studied by terahertz time-domain spectroscopy (THz-TDS) at different temperatures (10 K - 300 K).......

for more information click here (http://meetings.aps.org/Meeting/MAR12/Event/158999)

For TeraView's range of products see http://www.teraview.com/products/index.html

For more information information click here

Classification of terahertz-pulsed imaging data from excised breast tissue

2012-02-29T01:15:00.006Z

Anthony J. Fitzgerald and Vincent P. Wallace

University of Western Australia, School of Physics, Crawley 6009, Australia

Sarah Pinder and Anand D Purushotham

King’s College London, Section of Research Oncology, Guy’s Hospital, London SE1 9RT, United Kingdom

Padraig O’Kelly and Philip C. Ashworth

TeraView Ltd., Platinum Building, John’s Innovation Park, Cowley Road, Cambridge, CB4 0WS, United Kingdom

University of Cambridge, Semiconductor Physics Group, Cavendish Laboratory, Cambridge, CB3 0HE, United Kingdom

J. Biomed. Opt. 17, 016005 (Feb 06, 2012)

We investigate the efficacy of using data reduction techniques to aid classification of terahertz (THz) pulse data obtained from tumor and normal breast tissue. Fifty-one samples were studied from patients undergoing breast surgery at Addenbrooke’s Hospital in Cambridge and Guy’s Hospital in London .....

for more information click here

or here http://dx.doi.org/10.1117/1.JBO.17.1.016005

... Data Acquisition Data from all breast specimens were collected using TPIscan (TeraView Ltd.,
Cambridge, UK). ...

For TeraView's range of products see http://www.teraview.com/products/index.html

For more information information click here

New Centre for Terahertz Science and Engineering (CTSE)

2012-02-28T01:00:00.002Z

Welcome to the Centre for Terahertz Science and Engineering (CTSE), established in February 2012. This Imperial College London centre is in partnership with the UK's RAL Space Millimetre Wave Technology Group and is located within the Faculty of Engineering at Imperial College London. Our main goal is to become the leading UK platform for terahertz (THz) science and engineering, dedicated to the following:

Research and development of new materials and their electromagnetic characterization for THz applications
Research and development of passive components and active devices, based on advanced functional materials and micro/nano-fabrication processing technologies
Exploration of new applications in the areas of telecommunication and electromagnetic sensing for bioengineering, security and defence applications
Interdisciplinary education and training in electromagnetic material characterization, millimetre-wave and terahertz engineering, device/circuit simulation and metrology.

In addition, CTSE provides:

A forum to stimulate more formal inter-departmental/faculty collaboration at Imperial College London, ensuring cross-fertilisation between different fields of research.
A joint facility for external collaboration with academia, research laboratories, government agencies and industry.
A forum for the exchange of ideas between researchers, as well as a focal point for the exchange of expertise and resources.
A venue for educational teaching activities (e.g. joint masters degree courses and Summer Schools).

TeraView at the International Forum on Terahertz Spectroscopy and Imaging - March 2012

2012-02-27T08:34:00.000Z

Denken Sie daran, Ihr Treffen mit David Lowe (david.lowe @teraview.com) zu buchen bei der "International Forum on Terahertz Spectroscopy and Imaging" am Fraunhofer-Zentrum, Kaiserslautern(Deutschland) nächste Woche.

Remember to book your meeting with David Lowe (david.lowe@teraview.com) at the "International Forum on Terahertz Spectroscopy and Imaging" at Fraunhofer-Zentrum, Kaiserlautern (Germany) next week.

To see TeraView's products visit
http://www.teraview.com/products/index.html

3rd EOS Topical Meeting on Terahertz Science & Technology (TST 2012)

2012-02-25T09:46:00.000Z

Location:

Kaiserstejnsky Palace, Prague, Czech Republic

Duration:

17 June 2012 - 20 June 2012

Submission Timeframe:

15 December 2011 - 24 February 2012

General Chair(s):

Petr Kužel - Institute of Physics of the ASCR / Czech Republic
Peter Uhd Jepsen - Technical University of Denmark / Denmark

Program Committee:

Richard Averitt - Boston University / United States
Jean-Louis Coutaz - Université de Savoie / France
Guilhem Gallot - Ecole Polytechnique / FR
Rupert Huber - Universität Konstanz / Germany
Michael Johnston - University of Oxford / United Kingdom
Martin Koch - Philipps-Universitaet Marburg / Germany
Chiko Otani - Riken Sendai / Japan
Paul C.M. Planken - Delft University of Technology / Netherlands
Masayoshi Tonouchi - Osaka University / Japan
Alessandro Tredicucci - NEST, CNR-NANO / Italy
Karl Unterrainer - Technische Universität Wien / Austria

Topics

Emission of THz radiation (QCLs, HEMTs, FELs, synchrotrons, nonlinear optics etc.)
Detection of THz radiation (quantum dots, single photon detectors, time-gated, HEMTs etc.)
THz integrated optics, waveguiding, plasmonics, metamaterials, photonic crystals
Interaction of THz radiation with matter (dielectrics, semiconductors, nanostructured materials, liquid-state dynamics, chemistry, biology, ultrafast spectroscopy etc.)
Nonlinear phenomena induced by THz radiation
THz far-field and near-field imaging, THz microscopy and microspectroscopy
Remote sensing of gases and chemical / biological agents
THz applications (security, telecom, remote detection etc.)

Keynote Speaker

Xi-Cheng Zhang, University of Rochester (US)

Masterclass Speakers

Edmund H. Linfield, University of Leeds (GB)
Keith A. Nelson, Massachusetts Institute of Technology (US)

Invited Speakers

Dave Cooke, McGill University (CA)
Kodo Kawase, Nagoya University (JP)
Junichiro Kono, Rice University (US)
Oleg Mitrofanov, University College London (GB)
Hynek Nemec, Academy of Sciences of the Czech Republic (CZ)
Alexej Pashkin, University of Konstanz (DE)
Marco Rahm, Technical University of Kaiserslautern (DE)
Giacomo Scalari, ETH Zurich (CH)
Miriam Vitiello, National Research Council (IT)

Venue

Prague, the capital of the Czech Republic, is a most valuable historical city reserve. In 1992, the historical core of the city covering 866 hectares was listed in the UNESCO World Cultural and Natural Heritage Register. Prague represents a unique collection of historical monuments dominated by the Prague Castle which towers high above the city (www.praguewelcome.cz).

TST 2012 will take place at Kaiserstejnsky Palace which is located in the Prague Lesser Town and has been hosting events for more than three centuries.

Its total reconstruction began under the architects Zdeněk Pokorný and Jaroslav Bělský in 1977, and it was registered a UNESCO heritage site in 1981. Restitution procedures were completed and the palace returned to its original owners in 1997.

For more information see

http://www.myeos.org/events/tst2012

3D-Tablettenprüfung mittels Terahertz

2012-02-24T18:03:00.002Z

(Terahertz imaging note in German)

23.02.2012

Schichtaufbau und Integrität von Tabletten lassen sich mit THz-Strahlung berührungslos und schnell prüfen. Die Technik ist nun auch als Auftragsanalytik für Pharmaunternehmen verfügbar.

In Ergänzung zu seiner Laboreinrichtung in Cambridge bietet die auf THz-Strahlung spezialisierte britische TeraView Ltd. jetzt auch in Dayton, Ohio, USA, am Institute for the Development and Commercialization of Advanced Sensor Technology, IDCAST, pharmazeutischen Unternehmen Zugang zu einem Echtzeit-Messverfahren für den Schichtaufbau von Tabletten. Das Verfahren erfasst mithilfe gepulster THz-Strahlung (Terahertz pulsed imaging, TPI) von 2 bis 120 cm-1 zerstörungsfrei und direkt in der laufenden Produktion die Varianz der Schichtdicken, Partikelagglomerationen und Dichteschwankungen. Auch Prozesse wie das Eindringen von Wasser oder Luft, Probleme beim Aushärten oder mangelnde Integrität der Schichten können damit lokalisiert werden.
In enger Zusammenarbeit mit den Kunden wird anhand von THz-Messdaten die Entwicklung neuer Produkte oder technischer Fertigungsanlagen begleitet sowie zur Lösung von Qualitätsproblemen beigetragen. Der Service umfasst den Verleih des Messsystems TPI imaga 2000 sowie eine enge Betreuung der Untersuchungen. Damit sparen Kunden die Investition in eigene Prüfanlagen.
Auch aus anderen Anwendungsbereichen erreichen Teraview inzwischen Anfragen zur THz-Analyse, wie etwa in der Dentaltechnik, Lackschichten in der Automobilproduktion oder zur Detektion von Rissen und Schichtablösungen bei Keramiken.

BioPhotonik 1/2012

For more information see
http://www.photonik.de/biopl/98/3/0/228/3d-tablettenpruefung-mittels-terahertz.html

For help with your pharmaceutical problems also see
http://www.teraview.com/services/applications-support/index.html

Properties of InxGa1−xN films in terahertz range

2012-02-24T13:24:00.000Z

A. Gauthier-Brun^1,2, J. H. Teng¹, E. Dogheche², W. Liu¹, A. Gokarna², M. Tonouchi³, S. J. Chua¹, and D. Decoster²

¹Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 3 Research link, Singapore 117602, Singapore
²Institute of Electronics, Microelectronics and Nanotechnology, UMR-CNRS 8520, Avenue Poincaré, 59652 Villeneuve d’Ascq Cedex, France
³Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita-City, Osaka 565-0871, Japan

Abstract
In this letter, we report the characterization of the refractive indices and complex conductivities of a set of GaN films with different carrier concentrations, InN film, and In_xGa_1−xN films with indium content varying from x = 0.07 to x = 0.14 grown by metalorganic chemical vapor deposition for frequencies ranging from 0.3 to 3 THz using terahertz time-domain spectroscopy (THz-TDS). The refractive indices of In_xGa_1−xN films at THz range are reported. The carrier density and mobility determined using THz-TDS method show good agreement with four-probe Hall measurements.

Appl. Phys. Lett. 100, 071913 (2012)

for more information click here

The data was obtained using TeraView's Spectra 3000.

"The THz- TDS data are obtained using a TeraView Spectra 3000 system, in which the THz wave is generated by focusing a mode-locked Ti:sapphire laser beam with a wavelength of 800 nm and pulse width of 100 fs onto a low temperature- grown GaAs photoconductive ..."

Dielectric Properties of Monoclonal Antibodies to Influenza Using Terahertz Spectroscopy

2012-02-22T14:16:00.000Z

From the Proceedings of 2011 International Conference on Opto-Electronics Engineering and Information Science (ICOEIS 2011)

Abstract. In this paper we use terahertz spectroscopy to study the effects of the monoclonal antibody to influenza A and the monoclonal antibody to influenza B. The complex permittivity was measured over the frequency range 0.1-1.7 THz.
The investigated antibodies can be distinguished by the frequency dependence of the dielectric properties. Therefore terahertz spectroscopy may be useful for medical diagnoses where the presence of antibodies is indicative of disease.

...TPI Imaga 1000 (TeraView Limited, Cambridge, UK) was used to determine the
terahertz 1535 Page 2. dielectric response...

http://www.asaas.org/ICOEIS2011/N361.pdf

TeraView at the International Forum on Terahertz Spectroscopy and Imaging - March 2012

2012-02-20T13:02:00.001Z

TeraView will have a table top at the International Forum on Terahertz Spectroscopy and Imaging at Fraunhofer-Zentrum, Kaiserlautern (Germany)

http://www.teraview.com/news/terahertz-events/index.html

Come and visit us!

To organise a meeting please e-mail David Lowe

International Forum
on Terahertz Spectroscopy and Imaging

Nowadays Terahertz technology has proven to be a valuable tool for applications in diagnostics, measurement and testing. The industrial use of this technology, however, puts a lot of challenging questions.

The following renowned experts in the field of Terahertz Technology have confirmed invited to give invited lectures to the forum:

Prof. Dr. Daniel M. Mittleman, Rice University, USA
Prof. Dr. Peter Uhd Jepsen, Technical University of Denmark, Denmark
Prof. Dr. Koichiro Tanaka, Kyoto University, Japan

Scope:

The workshop refers to users, developers and manufacturers of THz measurement systems. The fifth workshop will address primarily the topics

1. Nondestructive Testing

2. Technology for Homeland Security

3. New Technologies

4. Health and Social Aspects of Terahertz Technology

TeraView hiring for summer intern job - Technical Marketing

2012-02-15T10:09:00.001Z

TeraView is seeking a Physics or Electronic Engineering undergraduate/recent graduate, for a temporary position (10-12 weeks). The role is primarily focused on technical marketing, with the incumbent working with various sources to generate leads whilst also supporting the various electronic marketing media.

For more information on this position visit our website on:
http://www.teraview.com/terahertz/about/careers-jobs.html

TeraView expands U.S. presence in Dayton

2012-02-14T13:16:00.000Z

UK-based TeraView, the world’s first company devoted to the application of Terahertz (THz) light for imaging and spectroscopy, opened its first overseas office in Dayton last year. Fresh from raising $5.5 million of new investment, the company is now expanding their facility in the Institute for the Development and Commercialization of Advanced Sensor Technology (IDCAST) to offer contract analytical services to U.S. pharmaceutical companies. From 1^st March, a TPI Imaga 2000 tablet imaging system will be available for demonstrations or rental and adds strength to the existing spectroscopy and imaging capability within IDCAST. The company also plans, in conjunction with IDCAST, to run a series of terahertz workshop aimed at showing how terahertz can be best used in pharmaceutical development..

“There is an impressive concentration of Terahertz systems and technology in this region,” said TeraView CEO Don Arnone last March. “Our long and productive associations with world-class researchers in this region, who we support and work with as collaborators and customers, make Ohio ideally suited for this facility.” TeraView has worked with scientists at Miami University, Ohio State, and Wright State, among others, and are eager to establish new collaborations with other institutions.

TeraView’s proprietary platform uses the THz spectrum between light and radio waves and offers the advantage of being non-invasive and non-destructive. Past studies have demonstrated how THz uniquely and non destructively provides chemical and 3D structural information in a diverse range of applications, including the contents of drug tablets, and other objects normally invisible to conventional detection techniques.

According to Sr. VP Sales and Marketing Ian Grundy, the company is moving more of their own equipment into rented IDCAST space and wants to expand contract analysis services. “Our contract analysis product gives pharma companies access to Terahertz technology and data to develop new products or help resolve quality issues, particularly at scale-up,” he said.

In conjunction with UK institutions, using a proprietary terahertz probe TeraView also has conducted in-vivo trials on the detection of various cancers using a THz probe. Work has been primarily done on skin and breast cancers. The results to-date have shown good specificity and selectivity. The company has also supplied its medical probe system to other researchers and is actively looking to expand its collaborations in the area.

Prediction of dissolution time and coating thickness of sustained release formulations using Raman spectroscopy and terahertz pulsed imaging

2012-02-08T09:45:00.001Z

· European Journal of Pharmaceutics and Biopharmaceutics

Available online 5 January 2012

Joshua Müller^a,
Daniela Brock^a,
Klaus Knop^a,
J. Axel Zeitler^b,
Peter Kleinebudde

Abstract
Raman spectroscopy was implemented successfully as a non-invasive and rapid process analytical technology (PAT) tool for in-line quantitative monitoring of functional coating. Coating experiments were performed at which diprophylline tablets were coated with a sustained release formulation based on Kollicoat® SR 30 D. Using PLS a multivariate model was constructed by correlating Raman spectral data with the mean dissolution time as determined by dissolution testing and the coating thickness as measured by terahertz pulsed imaging.
By performing in-line measurements it was possible to monitor the progress of the coating process and to detect the end point of the process, where the acquired coating amount was achieved for the desired MDT or coating thickness.
Mean dissolution time (MDT) over coating time predicted by Raman spectroscopy (top left) and in correlation to coating thickness measured by terahertz spectroscopy (top right). Layer thickness maps and histograms from TPI measurements after a short (left) and a longer (right) coating time.

Terahertz results were acquired on a TeraView's TPI2000 instrument.

For more information :
http://www.sciencedirect.com/science/article/pii/S0939641111003614

Keywords
- Process analytical technology;
- Multivariate data analysis;
- Raman spectroscopy;
- Terahertz pulsed imaging;
- Functional coating;
- Mean dissolution time

Structures and characterization of m-nisoldipine polymorphs - CrystEngComm (RSC Publishing)

2012-02-06T12:32:00.000Z

Structures and characterization of m-nisoldipine polymorphs - CrystEngComm (RSC Publishing)

Structures and characterization of m-nisoldipine polymorphs

2012-02-06T12:23:00.002Z

Paper

Caiqin Yang , Zhenwei Zhang , Yanli Zeng , Jing Wang , Yongli Wang and Baoqing Ma

CrystEngComm, 2012, Advance Article

DOI: 10.1039/C2CE06359J

http://pubs.rsc.org/en/content/articlelanding/2012/ce/c2ce06359j

Abstract

m-Nisoldipine, a dihydropyridine calcium ion antagonist, first synthesized in the School of Pharmaceutical Sciences, Hebei Medical University, exhibits two polymorphs A and B with different colors and morphologies. The single-crystal X-ray structure analysis reveals that polymorph A crystallizes in a monoclinic P2₁/c space group with a = 9.3045(2) Å, b = 16.5991(5) Å, c = 13.0018(3) Å, β = 91.539(2)° and Z = 4, while B crystallizes in a triclinic space group of P1 with a = 7.4965(2) Å, b = 11.4692(4) Å, c = 12.3648(5) Å, α = 68.093(2)°, β = 88.655(2)°, γ = 81.853(2)° and Z = 2. The m-nisoldipine molecules are connected through N–H....O hydrogen bonds between the carbonyl group and the amine group to form either a wavy chain for A or a linear chain for B. The two polymorphs show distinct physicochemical properties as characterized by IR, Raman, DSC and terahertz pulse spectroscopy. DFT theoretical calculations are also used to simulate the terahertz spectroscopy of the two polymorphs.

Intel terahertz supplier secures $5.5 million funds

2012-02-02T02:00:00.000Z

LONDON – TeraView Ltd. (Cambridge, England), a startup company founded in 2001 to develop terahertz systems for imaging and spectroscopy, has announced it has secured $5.5 million of investment from a consortium of U.S., Asian and European institutional and corporate investors.

Key areas for focus include sales and marketing in Asia, as well as the further development of products for the semiconductor inspection market. Intel and other major semiconductor manufacturers already use TeraView's products, the company said. Funding will also be used to enhance collaboration with existing customers in these markets...........

for more detail click here
http://www.eetimes.com/electronics-news/4235808/Intel-terahertz-supplier-secures-funds

To contact TeraView for more information click here
http://www.teraview.com/info/contact-us.php

TeraView listed among companies that dominate EU fundraising in January

2012-02-01T15:19:00.001Z

TeraView mentioned in this article from http://blogs.ft.com about where investment has been dominant during January!

Cambridge-based TeraView, which makes solutions based on Terahertz technology, raised $5.5m from New Hill Management and Full Circle Investments in the US, YFM Equity Partners and Turquoise International in the UK and other investors. Turquoise International invested on behalf of the UK Low Carbon Innovation Fund.

http://blogs.ft.com/fttechhub/2012/01/internet-companies-dominate-eu-fundraising-in-january/#ixzz1l8yDWuWa

Business Weekly writes about TeraView

2012-01-31T15:32:00.002Z

http://www.businessweekly.co.uk/hi-tech/13477-teraview-clinches-55m-global-growth-funding

Article on TeraView on CambridgeFirst!

2012-01-31T13:08:00.000Z

http://www.cambridgefirst.co.uk/business/teraview_secures_5_5m_to_fund_growth_1_1192032

New Article out in Cambridge Press

TeraView Secures $5.5m to Fund Growth in Key Markets

2012-01-26T11:05:00.001Z

For a list of all our press release and news also link to:

http://www.teraview.com/terahertz/news/terahertz-news/index.html

TeraView, Cambridge, United Kingdom – 26th January 2012

TeraView (http://www.teraview.com/), the pioneer and leader in Terahertz systems and solutions, is pleased to announce that it has secured $5.5m of investment from a consortium of US, Asian and EU based institutional and corporate investors.

The investment will allow TeraView to accelerate the growth of its semiconductor, industrial and analytical business in Asia, the US and the EU. Key areas for focus include sales and marketing in Asia, as well as further product development in its semiconductor inspection market. Funding will also be used to enhance support and collaborations with existing customers in these markets.

This investment has been secured at a time when TeraView has successfully demonstrated Terahertz applications across a variety of different industries, and there is a growing business need for the unique capabilities of Terahertz light. This need is driven, for example, by the mobile phone and consumer electronics industries, which aim to overcome limitations in the speed and functionality of current integrated circuits (ICs). Terahertz can be utilised in the development and manufacturing of both existing and new generations of semiconductor ICs, which are now widely used in mobile phones and tablet computers. Intel and other major semiconductor manufacturers currently use TeraView’s products.

TeraView has successfully secured customer funding to develop products in these and other markets. With the new capital from investors, TeraView will scale up its product delivery and manufacturing to meet increasing order patterns from current and new customers.

The funding round was led by New Hill Management and Full Circle Investments in the US, together with YFM Equity Partners and Turquoise International in the UK and other investors. Turquoise International invested on behalf of the UK Low Carbon Innovation Fund (LCIF), based at the University of East Anglia.

Richard Harvey, Chair of the LCIF Investment Committee commented ‘We are delighted to support this patented technology which offers carbon saving technology to high growth markets, which will bring jobs and growth to the region.’

David Livesley, Investment Director at YFM Equity Partners said: “We have been following TeraView’s progress for a number of years. As one of Britain’s most innovative technology businesses we are delighted that the opportunity has arisen for YFM Equity Partners’ funds to help accelerate its growth. We look forward to building our relationship with the Company and management team as they continue their international expansion working with major multinational clients.”

Don Arnone, TeraView’s CEO stated: ”We are delighted to have attracted support from new investors, including some of our key customers. The geographical spread of our investors – US, Asia, EU - also reflects the global nature of our business. Customers are deploying our products at their production sites across the world, and this investment greatly enhances our ability to support those customers, as well as expand our product development and sales and marketing activities in strategic areas such as the Asian semiconductor market.”

About Terahertz and TeraView (www.teraview.com)

Terahertz waves sit in the spectrum between infra red and microwave and as such have unique properties.

TeraView is the world’s first company devoted to the application of Terahertz light for imaging and spectroscopy. TeraView’s proprietary platform uses the Terahertz spectrum between light and radio waves and offers the advantage of being non-invasive and non-destructive. A key application of the technology is the detection of faults and quality variations in semiconductor integrated circuits. In addition, studies have demonstrated how Terahertz uniquely and non invasively provides 3 dimensional structural and chemical information in a diverse range of applications, including weapons/explosives hidden below clothing, the contents of tablets and capsules in the pharmaceutical industry, and other objects normally invisible to conventional detection techniques. Other markets for the technology exist in medical imaging of cancer and industrial inspection which are explored via commercial partners. Headquartered in Cambridge, UK, TeraView was spun-out of the Toshiba Cambridge Research Laboratory in April 2001. Sales and support are available throughout Europe, North America and the Far East either directly or through a network of distributors.

For more information visit us on:

http://www.teraview.com/terahertz/news/index.html

TeraView's booth at Photonics West!

2012-01-25T09:47:00.001Z

STAND 4109 of the UK Cluster!

Terahertz absorption spectra of benzene-1,2-diol, benzene-1,3-diol and benzene-1,4-diol

2012-01-23T14:58:00.002Z

Zhuanping Zheng, Wenhui Fan, Hui Yan

State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China

Received 18 August 2011; Accepted 23 December 2011. Available online 29 December 2011.

Abstract

The terahertz spectra (8-128 cm^-1) of three structural isomers have been measured using terahertz time-domain spectroscopy at room temperature. Substantial differences among these THz spectra have been found and implied that THz-TDS is an excellent tool to identify isomers. Numerical calculation based on solid-state density functional theory has been carried out and assigned the observed THz features theoretically. Good agreement between the calculated and experimentally measured spectra for benzene-1,2-diol and benzene-1,3-diol has been achieved. According to the calculated results, it is found that the measured THz spectra of these two isomers mainly originate from intermolecular vibrations.

Graphical abstract

1) The THz spectra of benzene-1,2-diol, benzene-1,3-diol and benzene-1,4-diol in the 8-128 cm^-1 range.

Highlights

► Terahertz spectra (8-128 cm^-1) of benzene-1,2-diol, benzene-1,3-diol, benzene-1,4-diol. ► Three isomers are clearly distinguished. ► Solid state density functional theory to compute. ► The good spectral reproduction of benzene-1,2-diol and benzene-1,3-diol has been achieved.

Keywords: Terahertz time-domain spectroscopy; Density functional theory; Benzene-1,2-diol; Benzene-1,3-diol; Benzene-1,4-diol

You can read more about this paper on:

http://www.sciencedirect.com/science?_ob=ShoppingCartURL&_method=add&_eid=1-s2.0-S0009261411015739&_acct=C000228598&_version=1&_userid=10&_ts=1325888099&md5=d75e284046767176d0fccf029df64628

Job Post - Applications and Customer Support Scientist

2012-01-20T10:11:00.001Z

A new job opportunity has arisen at teraView for an Applications and Customer Support Scientist

The role will include duties such as:
• Support existing customers with the operation and first line support of their terahertz equipment.
• Analyse customer samples either
• Develop appropriate terahertz analytical methods
• Run customer training/education events
• Contribute to product development

If you would like to know more about this position,
visit us on http://www.teraview.com/terahertz/about/careers-jobs.html

Also, follow us on twitter! Any updates will be posted there.
https://twitter.com/@TeraView

Thank you

Job Position at TeraView: Service Engineer

2012-01-19T10:39:00.001Z

TeraView is developing ways to exploit terahertz (THz) radiation in many ground-breaking applications. We are currently developing a number of products that require highly-skilled, enthusiastic and energetic people to work in this evolving company.

An opportunity has arisen for a Service Engineer to join our team to service and support our scientific instruments, both in the field and in house. We require an individual who is able to meet the existing operational needs of the company but who is also looking to join a company with opportunities for career development as the company grows.

You will have 3 years experience of working in a field service or technical support role, gained within a scientific instrumentation/equipment environment, and be familiar with the set up and alignment of optical instrumentation. Qualified to a minimum of HNC level or above in electronics or other relevant technical discipline, you will be a self-starter with a positive attitude and a proven ability to work in small multi-disciplinary teams. The role entails a significant level of overseas travel, sometimes with little notice. Experience of working within a formal quality system, such as ISO9001 is important.

Role & Responsibilities:

Reporting to the Service Manager, your responsibilities will include:

§ Servicing and maintaining instruments both in the field and in-house.

§Alignment of newly built instruments.

§ Factory Acceptance testing

§Assisting in the build of instruments

§Installation and Site acceptance testing

Key Skills: The successful applicant will have:-

· Experience as a service engineer

· Flexibility to travel worldwide

· Knowledge of lasers and alignment

· Knowledge of electronics

· Knowledge of working within a formal quality system

· Good interpersonal skills

· Good attention to detail

· Ability to produce high quality documentation

· Own transport and a clean driving licence

Experience and Education:

Essentials:

§ HNC or above in electronics or similar technical discipline

§ Previous experience of working in service/support of scientific instrumentation

§ Strong customer facing skills

§ Good communication skills

§ The ability to work alone and on own initiative

§ Demonstration of strong fault-finding skills

§ Ability to work in a team

§ Flexible approach to work

§ Ability to travel abroad and at short notice

Desirables:

· Knowledge of terahertz systems or similar products

TeraView offers an excellent salary and benefits package, along with the opportunity for highly-motivated staff to work together and shape the development of products in one of the newest and most exciting areas of technology. We are an equal opportunities employer and pride ourselves on our diverse workforce. For further information and background on the company, please visit our website on: www.teraview.com

If you think you have the skills and qualities we need, please send your CV, with a covering letter, outlining your current role and remuneration to:

Padraig O’Kelly

TeraView Limited

Platinum Building

St John’s Innovation Park

Cambridge CB4 0WS

e-mail: recruitment@teraview.com

Photonics West: TeraView will be part of the companies in the UK cluster

2012-01-18T10:33:00.001Z

Meet us at North Hall - Stand 4109 - NEXT WEEK!!

http://www.teraview.com/terahertz/news/terahertz-events/index.html

TeraView at "Lasers & Photonics Marketplace" seminar

2012-01-17T10:19:00.001Z

2012 CONFERENCE AGENDA

W Hotel
181 3rd Street
San Francisco, CA

Forum Panelists

3:35 pm January 23, 2012
Terahertz Technology for 3D Imaging and Spectroscopy
Teraview

Terahertz technology can provide a range of applications for drug discovery and formulation, medical and dental diagnostics, security screening, and explosives and contraband detection. The list has recently been expanding to include applications in the food, agriculture, cosmetics, paints and coatings, and semiconductor markets. And yet barriers remain to its widespread adoption. What will it take to really emerge?

Full program of the seminar

THE LASERS & PHOTONICS MARKETPLACE SEMINAR is the only event anywhere in the world that focuses on the entire laser marketplace. It provides a comprehensive market perspective that is unobtainable elsewhere, with market data segmented by applications and laser technology from three of the photonics industry's leading resources: Laser Focus World, which delivers global coverage of the entire photonics industry; Industrial Laser Solutions, a primary source of information on industrial laser materials processing; and Strategies Unlimited, the world’s foremost photonics market research company. In addition, industry experts present their views and analysis of photonics-market trends, applications development, and business outlook.

HELD IN CONJUNCTION WITH SPIE'S PHOTONICS WEST, the Lasers & Photonics Marketplace Seminar is a one-day event that analyzes the business of photonics. Now in its 24th year, the annual seminar provides photonics industry decision makers and stakeholders with market information and analysis, a look at emerging opportunities, and a forum for networking.

WHO SHOULD ATTEND?
This event is intended for business leaders and key players at photonics manufacturers and their suppliers as well as anyone with a stake in the business of photonics, such as technology analysts and investors. Target attendee audience includes:

•    Presidents, CEOs, and COOs
•    Chief Technology Officers
•    R&D Management
•    Sales and Marketing Executives
•    Business Development Directors
•    Managing Directors
•    Business/Technology Analysts

Photonics West: Dr. Phil Taday's talk: Real-world applications of terahertz pulsed technology

2012-01-16T10:44:00.001Z

21 - 26 January 2012 The Moscone Center San Francisco, California, USA

Real-world applications of terahertz pulsed technology

Paper 8261-20 of Conference 8261

Date: Thursday, 26 January 2012

Author(s): Philip F. Taday, TeraView Ltd. (United Kingdom)

Abstract: Over the past twenty years terahertz sensor technology has been looking for a "killer" application since the first demonstration of free-space radiation following exposure of a GaAs co-planar strip line to an ultrafast pulsed laser. In the early years, research groups rapidly looked first at dental applications and then skin cancer; however these applications are driven by cost and regulation which make these areas difficult and expensive to penetrate. Early in this century, applications in non-destructive testing began to come to the forefront. This paper discusses the new exciting applications of terahertz pulsed technology in solving real world problems.

Also come and see us at Booth 4109 - North Hall Stand

if you would like to pre-arrange a meeting, please e-mail Phil Taday.

Follow us on Twitter!

2012-01-13T16:19:00.002Z

TeraView now has a Twitter account!
Follow us on Twitter and get all our latest news.

You can find a link to our twitter page on our homepage:
http://www.teraview.com/terahertz/

or you can link to
https://twitter.com/#!/teraview

The ideal tool for researching metamaterials

2012-01-13T14:31:00.001Z

If you are working on metamaterials, you will be interested in knowing that a growing number of researchers around the world are using the Spectra 3000 as a tool for investigating metamaterials. Here you can find a brief description of the benefits of TeraView's spectrometer to investigate metamaterials, but if you would like to know more visit our website on:
http://www.teraview.com/terahertz/applications/material-characterization/metamaterials.html

Spectra 3000 as a tool to investigate metamaterials

Instrument performance is our one of key design criteria, our terahertz spectral range, power, dynamic range and signal to noise ratio are world leading. Using our patented detector and emitter system we have designed a platform that can accommodate multiple modules to allow full flexibility and ease of use. No alignment is needed and the system is completely laser safe. As terahertz light is invisible to the naked eye and the exposure to the generation laser is not safe, alignment of bench top systems can be difficult and time consuming, this is eliminated with the Spectra 3000. With powerful, flexible, bespoke software and field proven design, time can be directly spent on measurements and research rather than equipment set-up. It is typical from delivering a Spectra 3000 the customer is taking readings on their samples within minutes. In many cases, purchasing a Spectra 3000 is less expensive than assembling your own bench-top system, can allow more flexibility and prices are less than you might expect for the level of performance and range of applications.

The main benefits include:

Truly expandable with the addition of modules and fibre probes now or later
Terahertz transmission and reflectance measurements on solids, liquids, suspensions, slurries and films
Spectral Range – 0.06 THz to 4 THz (2 cm^-1 - 120 cm^-1) best in class with maximum power levels across the whole range
Accommodates standard IR sampling accessories
Solid-state emitter and detector for ambient temperature operation
Bespoke optics casting with aligned optics for consistent maximum performance
Fully integrated spectroscopy and imaging software with file export functions
Easy to use modules for a variety of experiments:

Transmission
Transmission XY mapping
Reflection imaging
Attenuated total Reflection (ATR)
Remote fibre probes heads
Cryostat for transmission and reflection
Cooled and heated transmission cells
Large area and portable scanning gantries
Angular goniometer systems
Specular reflection
Medical scanning probes
Standoff detection modules

If you would like more information, research papers or full specification of the instrument, please reply to this mail and I will send you an information pack.

Institutes are already getting good results with the Spectra 3000 researching into metamaterials and split ring resonators using the Spectra 3000. Details can be found here.

http://www.teraview.com/terahertz/applications/material-characterization/metamaterials.html

If you have any questions do not hesitate to get in touch.

http://www.teraview.com/info/contact-us.php

Job opportunity at TeraView

2012-01-09T17:03:00.001Z

Application Scientist

TeraView, the world leader in the design and manufacture of Terahertz products, is pioneering the use of terahertz technology in a number of ground breaking applications within the pharmaceutical, security, medical and materials markets. Based in Cambridge UK the company has a global client base and a growing, highly skilled workforce.

A vacancy for maternity cover has arisen within TeraView’s Applications Group for a Scientist to assist our customers in solving their analytical requirements to meet their business objectives. Reporting to the Head of Applications you will use your technical knowledge and understanding in both pre and post sales situations and make significant technical contributions to white papers, datasheets, manuals and product extension and development.

For a detailed description of the job please visit our website at http://www.teraview.com/terahertz/about/careers-jobs.html

Multiferroic transition-metal oxides: Analysis of the polar groundstates by dielectric spectroscopy

2011-12-23T13:12:00.000Z

Source:

(2011) Auch gedruckt erschienen: ISBN 978-3-86664-977-4

pdf-format:

Dokument 1.pdf (5.469 KB)

PhD Thesis, work carried out using TeraView's Spectra 3000

Transition-metal oxides show a broad spectrum of fascinating physical effects. Among these, materials with multiferroic properties play a prominent role in basic research and technical application.

The present work deals with several multiferroic compounds and the origins of their polar orders. LiCuVO4 and the rare-earth manganites RMnO3 show a polar order due to a complex magnetic structure. By measurements of polarisation in external magnetic fields, the relation between magnetic and polar order in LiCuVO4 is analysed. Dielectric spectroscopy reveals a relaxation process as key to the magnetocapacitive effects in the rare-earth manganites. Magnetite, which shows relaxorferroelectricity, is a system where the polar order is connected to the charge order of the system.

http://opus.bibliothek.uni-augsburg.de/volltexte/2011/1769/

in German

Institute:		Physics/ Materials Science
Faculty:		Faculty of Mathematics and Natural Sciences
Dewey Decimal Classification:		Physics
Document type:		Dissertation
Advisor:		Loidl, Alois (Prof. Dr.)
Language:		German
Date of examination:		17.05.2011
Year of creation:		2011
Date of publication:		22.07.2011

Maskless multiple-beam laser lithography for large-area nanostructure/microstructure fabrication

2011-12-21T10:56:00.001Z

Min Tang, Zai Chun Chen, Zhi Qiang Huang, Yoo Sang Choo, andMing Hui Hong

Applied Optics, Vol. 50, Issue 35, pp. 6536-6542 (2011)
http://dx.doi.org/10.1364/AO.50.006536

Abstract

This paper reports a maskless multiple-beam laser lithography technique for large-area nanostructure/microstructure fabrication. This lithography technique can flexibly generate arbitrary nanostructures/microstructures over a large area at a high speed. The feature size of the nanostructures/microstructures can be controlled by exposure time and moving speed of the nanostage. Functional predesigned patterns, including split-ring resonator metamaterials for terahertz waves, can be obtained. More complicated structures can be made by single- and double-exposure schemes to make hybrid nanostructures/microstructures and tune surface plasmonic resonance properties. Meanwhile, microstructures with large height to lateral dimension ratios (2.5D microstructures) fabricated on silicon substrates can be used as mold tools for soft lithography. This technology shows its unique capacity to create various nanostructures/microstructures for extensive applications.

Measurements were performed using TeraView's TPS Spectra 3000

... The line width of the SRR structure is ∼6μm, and the SRR dimension is 40μm. The trans-
mission spectra of the terahertz metamaterials are characterized by a terahertz time-domain
spectro- scope (TeraView, TPS3000) with a normal incident ...

Citation
Min Tang, Zai Chun Chen, Zhi Qiang Huang, Yoo Sang Choo, and Ming Hui Hong, "Maskless multiple-beam laser lithography for large-area nanostructure/microstructure fabrication," Appl. Opt. 50, 6536-6542 (2011)
http://www.opticsinfobase.org/abstract.cfm?URI=ao-50-35-6536

View Full Text: Acrobat PDF (747 KB)

STRUCTURAL APPLICATIONS OF TERAHERTZ SPECTROSCOPY

2011-12-13T14:21:00.002Z

Journal of Molecular Structure

Volume 1006, Issues 1-3, 14 December 2011, Pages 66-76 STRUCTURAL APPLICATIONS OF TERAHERTZ SPECTROSCOPY

doi:10.1016/j.molstruc.2011.05.048 | How to Cite or Link Using DOI

Permissions & Reprints

Terahertz spectroscopy: Its future role in medical diagnoses Edward Philip John Parrott a, Yiwen Sun a, 1, Emma Pickwell-MacPherson b, ,

Purchase

a Electronic Engineering Department, The Chinese University of Hong Kong, New Territories, Hong Kong

b Electronic & Computer Engineering, The Hong Kong University of Science & Technology, Clear Water Bay, Hong Kong

Available online 13 June 2011.

Abstract

Over the past two decades, terahertz radiation has received a lot of interest due to advances in emission and detection technologies in the late 1980s and early 1990s which allowed the construction of coherent source/detection regimes. This paper focuses on reviewing the use of terahertz radiation in the investigation and understanding of biological systems and medical diagnosis. In particular, research on terahertz spectroscopy of biomolecules, from amino acids to proteins is presented, and examples of potential medical applications are discussed.

Highlights

► Principles of terahertz spectroscopy. ► Properties of terahertz light. ► Time and frequency domain analysis of terahertz data. ► Molecular and medical terahertz spectroscopy.

Keywords: Terahertz imaging; Terahertz spectroscopy; Protein spectroscopy; Biomedical; Intermolecular interactions; Cancer

Article Outline

1. Introduction to terahertz radiation

1.1. Generation and detection of broadband pulses of terahertz radiation 1.2. Time-domain analysis 1.3. Frequency-domain analysis 1.4. Introduction to intermolecular interactions 2. Molecular spectroscopy 2.1. Introduction 2.2. Amino acids and peptides 2.3. Deoxyribonucleic acid (DNA) 2.4. Proteins 3. Medical spectroscopy 3.1. Understanding contrast 3.2. Enhancing contrast 3.3. Other medical applications 4. Summary Acknowledgments References

Corresponding author. Tel.: +852 2358 5034.

1Present address: Medical School, Shenzhen University, Guangdong, 518060, Peoples Republic of China.

First Sale in Russia for TeraView

2011-12-09T12:34:00.000Z

TeraView (http://www.teraview.com/), the pioneer and leader in Terahertz technology, along with its distributor in the region, Bruker Optics (www.bruker.com), has just delivered and installed its first instrument in the Russian Federation at the Russian Academy of Sciences, Institute of Cell biology (ICB RAS).
ICB was formed in 1990 under the prestigious umbrella of the Russian Academy of Sciences and performs studies in to the biophysics of cell function. The terahertz instrument will perform research intermolecular interactions and hydrogen bonding in cells structures in vitro.
The sale adds to TeraView’s growing installed base worldwide, and helps strengthen its position into an expanding research market in Russia.
Dr Don Arnone, TeraView’s CEO stated ‘Yet another sale of the TPS spectra 3000 adds to the growing list of prestigious academic institutes choosing our equipment and is an important first sale into the Russian academic market. We are hopeful it will lead to more users in the region”.

About Terahertz

Terahertz waves sit in the spectrum between Infrared and Microwave and as such have unique properties which enables them to pass through/into objects, and whilst so doing to transmit images and spectra which provide unique information in a safe, fast and non destructive manner.

Collective Mode Frequency Shifts in L-Serine and a Series of Isotopologues in the Terahertz Regime

2011-12-01T13:37:00.001Z

by: David C. Hufnagle, Anita R. Taulbee-Combs, Wolfgang U. Spendel, Gilbert E. Pacey

Abstract

Terahertz (THz) time-domain spectroscopy was used to monitor collective mode shifts in L-serine, L-serine-2,3,3-d3, L-serine-d4, and L-serine-d7 at both room and liquid nitrogen (LN2) temperatures. Increasing the molecular mass by deuteration caused an expected absorbance red-shift; however, the magnitude of the displacement could not be predicted using normal mode analysis. Both modes at 67.8 cm−1 and 91.4 cm−1 demonstrated a greater peak shift upon deuterium substitution at non-hydrogen bonding sites than at sites that participated in hydrogen bonding. This is evident in the larger peak shifts observed in L-serine-d3 than in L-serine-d4, despite a smaller increase in mass. This leads to the conclusion that both peaks present in the room temperature spectra of L-serine likely arise primarily from other intermolecular interactions with <50% contribution from hydrogen bonding. This goes against the prediction that peaks in the THz spectra of amino acids are predominantly due to the hydrogen bonding network that makes up the crystal lattice.

View Abstract

AN EXPLORATION OF THE UTILITIES OF TERAHERTZ WAVES FOR THE NDE OF COMPOSITES

2011-11-23T11:39:00.001Z

AIP Conf. Proc. / Volume 1335 / Issue 1

AN EXPLORATION OF THE UTILITIES OF TERAHERTZ WAVES FOR THE NDE OF COMPOSITES

AIP Conf. Proc. -- June 23, 2011 -- Volume 1335, pp. 533-540
REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Volume 30A; Volume 30B; doi:10.1063/1.3591897

ABSTRACT

Issue Date: 23 June 2011

David K. Hsu, Kwang-Hee Im, Chien-Ping Chiou, and Daniel J. Barnard
Center for Nondestructive Evaluation, Iowa State University, Ames, Iowa 50011

Wereport an investigation of terahertz waves for the nondestructive evaluationof composite materials and structures. The modalities of the terahertzradiation used were time domain spectroscopy (TDS) and continuous wave(CW). The composite materials and structures investigated include both non-conductingpolymeric composites and carbon fiber composites. Terahertz signals in theTDS mode resembles that of ultrasound; however, unlike ultrasound, aterahertz pulse can detect a crack hidden behind a largercrack. This was demonstrated in thick GFRP laminates containing doublesaw slots. In carbon composites the penetration of terahertz wavesis quite limited and the detection of flaws is stronglyaffected by the angle between the electric field vector ofthe terahertz waves and the intervening fiber directions. The structurestested in this study include both solid laminates and honeycombsandwiches. The defects and anomalies investigated by terahertz waves wereforeign material inclusions, simulated disbond and delamination, mechanical impact damage,heat damage, and water or hydraulic fluid ingression. The effectivenessand limitations of terahertz radiation for the NDE of compositesare discussed. ©2011 American Institute of Physics

View abstract online

Explosives characterization in terahertz range (Proceedings Paper)

2011-11-18T11:25:00.000Z

Author(s): I. Maestrojuán; I. Palacios; D. Etayo; J. C. Iriarte; J. Teniente; I. Ederra; R. Gonzalo
Date: 13 October 2011

Paper Abstract

A Thz spectral characterization of the behaviour of different explosives is presented in this paper. This characterization will be done in the frequency range from 20 GHz to 4 THz using a Teraview Spectra 3000. This system has a capacity of measuring from 20 GHz to 4 THz fed by a laser source. With the Teraview Spectra 3000 equipment will be possible to calculate the refractive index, the absorbance and other important parameters of the explosive samples. With this study it will be possible to characterize some of the most common used explosives, i.e., gun explosive, gunpowder mine, pent, TNT, RDX, etc, and it will allow to determine their electromagnetic peculiarities in order to design a future imaging system that allow detecting them in security and defense sectors.

Proceedings Vol. 8188

Millimetre Wave and Terahertz Sensors and Technology IV, Keith A. Krapels;Neil A. Salmon; Eddie Jacobs, Editors, 81880N

DOI: 10.1117/12.898152

Current SPIE Digital Library subscribers click here to download this paper.

TeraView at the 37TH INTERNATIONAL SYMPOSIUM FOR TESTING & FAILURE ANALYSIS

2011-11-07T17:19:00.003Z

VISIT US AT the 37THINTERNATIONAL SYMPOSIUM FOR TESTING & FAILURE ANALYSIS,
BOOTH 522

If you would like to pre-arrange a meeting, please contact Martin Igarashi

ISTFA 2011

Terahertz Time-Domain Spectroscopy of Solid Samples: Principles, Applications, and Challenges

2011-11-03T11:03:00.002Z

... Different ranges are specified in both the peer-reviewed literature (2–4) and documentation from instrument vendors (55. TeraView. “Terahertz radiation”. Available at: http://teraview.co.uk/terahertz/...

DOI:
10.1080/05704928.2011.614305
Ryan M. Smith^a & Mark A. Arnold^a
pages 636-679
Available online: 07 Oct 2011

Abstract

Advances in ultrafast lasers and semiconductor technologies have facilitated access to the terahertz (THz) frequency range for spectroscopic and imaging purposes. THz time-domain spectroscopy (TDS) is commonly used to acquire spectral data having high signal-to-noise ratios (SNRs) over a broad range of THz frequencies. THz-TDS instrumentation is commercially available, thereby enabling novel applications of THz time-domain (TD) imaging and spectroscopy in a myriad of applications. This review gives a general description of the instrumentation available for collecting THz-TD data and focuses on measurements of solid samples. Measurement geometries useful for collecting THz-TD data from solid samples are reviewed and a summary is presented of the major applications to the analysis of solid samples related to security issues, as well as samples originating from the pharmaceutical industry, dental sciences, biological samples, and polymer materials. Emphasis is also given to analytical applications in a discussion of the analytical challenges met in quantification of solid analytes by THz-TDS methods.

To read more about this review:

http://www.tandfonline.com/doi/abs/10.1080/05704928.2011.614305

ELECTRICAL CONDUCTIVITY AND ELECTROMAG-NETIC SHIELDING EFFECTIVENESS OF SILICONE RUBBER FILLED WITH FERRITE AND GRAPHITE POWDERS

2011-10-28T11:58:00.001+01:00

Progress In Electromagnetics Research M, Vol. 21, 93-104, 2011

C. Morari*, I. Balan, J. Pintea, E. Chitanu, and I. Iordache

*National Institute for Research and Development in Electrical
Engineering ICPE-CA, Splaiul Unirii, No. 313, Bucharest 030138,
Romania

Abstract There is increasing interest in electromagnetic interference
(EMI) shielding due to the serious electromagnetic environment
pollution caused by the continuously increased use of the electrical
products and electronic devices. Electrical conductivity and EMI
shielding effectiveness (SE) of composite materials made from silicone
rubber with carbon powder and ferrite powder have been studied
in microwaves and terahertz frequency ranges and the results are
presented in this paper. In microwaves range, samples with higher
electrical conductivity show a small variation of shielding performance
with frequency, whereas the performance of samples with lower
conductivity falls away with increasing frequency. It is shown that
the variation of attenuation with frequency relates to the conductivity
of the material

... The samples were then studied in the 0.06–3THz (2–100cm−1) frequency range using the TeraView TPS spectra 3000terahertz transmission spectrometer. First, a reference spectrum was acquired with no sample mounted on the sample holder. ...

If you would like to read more about this article please click here

Our second International Terahertz Hands-on Workshop has been a great success!

2011-10-17T17:38:00.000+01:00

Last week we held the second International Terahertz Hands-on workshop. Everybody enjoyed the workshop, while learning about terahertz applications and technology.

Thank you for all your positive feedback!

After great demand, we have decided to hold a third International Terahertz Workshop in Spring 2012, if you would like to express your interest in participating to it please contact us through our website at www.teraview.com or writing an email to workshop@teraview.com

Below are some pictures from last week's workshop.

Thank you all for reading our news on this blog!

Terahertz pulsed imaging in vivo: measurements and processing methods

2011-10-13T11:02:00.001+01:00

J. Biomed. Opt. 16, 106010 (Oct 03, 2011); doi:10.1117/1.3642002

Edward P. J. Parrott, Stanley M. Y. Sy, and Thierry Blu

Chinese University of Hong Kong, Department of Electronic Engineering, Shatin, Hong Kong

Vincent P. Wallace

University of Western Australia, School of Physics, Perth, WA 6009, Australia

Emma Pickwell-MacPherson

The Hong Kong University of Science & Technology, Electronic and Computer Engineering, Clearwater Bay, Hong Kong

This paper presents a number of data processing algorithms developed to improve the accuracy of results derived from datasets acquired by a recently designed terahertz handheld probe. These techniques include a baseline subtraction algorithm and a number of algorithms to extract the sample impulse response: double Gaussian inverse filtering, frequency-wavelet domain deconvolution, and sparse deconvolution. In vivo measurements of human skin are used as examples, and a comparison is made of the terahertz impulse response from a number of different skin positions. The algorithms presented enables both the spectroscopic and time domain properties of samples measured in reflection geometry to be better determined compared to previous calculation methods.

Note from the editor:
The hand-held probe that was used in the Hong Kong University of Science and Technology is designed by TeraView Ltd, just another demonstration of TeraView's worldwide install base!

....As a result, in vivo imaging is performed in reflection geometry. Since skin is the most easily
accessible organ of the body, we have been using it to conduct in vivo experiments with
a handheld probe designed by Teraview Ltd (Cambridge, UK). ...

View more on this article

2nd International Workshop - spaces now full

2011-10-06T12:38:00.002+01:00

Our 2nd International Workshop will be taking place next week!
This particular one is fully booked, but given the interest, we are planning a third one in Europe!
This will take place most likely in Cambridge - UK in Spring 2012.

If you are interested in possibly taking part in the workshop, drop us an email at
workshop@teraview.com

We look forward to hearing from you.

For more infromation on the workshop follow the link on our website.

THz Reﬂection Spectroscopy of Explosives Measured by Time Domain Spectroscopy

2011-10-04T11:31:00.002+01:00

ACTA PHYSICA POLONICA A Vol. 120 (2011)

N. Palka

Institute of Optoelectronics, Military University of Technology

S. Kaliskiego 2, 00-908 Warsaw, Poland

ABSTRACT

Reﬂection spectra of pure explosive materials and their simulants were measured in transmission and reﬂection by means of time domain spectroscopy in the range 0.1–3 THz. Spectra measured in two reﬂection conﬁgurations:
specular with incident angle equal to 45 degrees and stand-oﬀ with close to normal incidence and distance 30 and 40 cm. to a sample.

Spectra were acquired using commercial time domain spectroscopy (TDS) setup from TeraView (TPS Spectra 3000) with appropriate accessories in atmosphere with humidity less than 1%.

To read more about this article follow this link:

http://przyrbwn.icm.edu.pl/APP/PDF/120/a120z4p32.pdf

International THz Conference - November 24-25, 2011 – Villach, Austria

2011-09-30T16:02:00.000+01:00

http://www.thz-conference.com/

In recent years the technology enabling terahertz imaging and spectroscopy has progressed remarkably. Techniques that were previously confined to the laboratory are now finding applications in industry.

The International Terahertz Conference will bring together experts in the development of Terahertz techniques, as well as those applying the technology to industrial applications.

The conference will focus on recent advances in the generation and detection of Terahertz radiation as well as its use for imaging, spectroscopy and industrial applications. At the International Terahertz Conferenceyou will have the opportunity to meet and talk with leading experts in the field. If you have already a particular application in mind we could discuss this prior the conference.

We look forward to your visit, because
„what is to change the world tomorrow, has to be developed today“

International THz Conference -November 24-25, 2011 – Villach, Austria

SIGNAL MODELING IN THE FAR-INFRARED REGION FOR NONDESTRUCTIVE EVALUATION APPLICATIONS

2011-09-23T13:19:00.000+01:00

AIP Conf. Proc. / Volume 1335 / Issue 1

AIP Conf. Proc. -- June 23, 2011 -- Volume 1335, pp. 581-588
REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Volume 30A; Volume 30B; doi:10.1063/1.3591903

Issue Date: 23 June 2011

ABSTRACT

Chien-Ping Chiou, David K. Hsu, Dan Barnard, Kwang-Hee Im, and R. Bruce Thompson
Center for Nondestructive Evaluation, Iowa State University, Ames, Iowa 50011

Terahertzradiation (a.k.a. T-ray) has emerged as a powerful inspection techniquein recent years. It extends into the lower region offar-infrared in the electromagnetic spectrum, and has been proven veryeffective in many NDE applications. T-ray is particularly useful insome areas where accessibility is difficult or even not possiblefor other conventional NDE methods. Here we report a modelingeffort of T-ray signal in one such application: the detectionof “hidden delamination”, a special situation that a delamination wasshadowed by another. This special case was experimentally simulated bytwo parallel saw-cuts in glass composites. In this paper, wealso explore the feasibility of combing T-ray and Fourier transforminfrared spectroscopy using a unified least-squares scheme for material characterization. ©2011 American Institute of Physics

Permalink:

http://link.aip.org/link/?APCPCS/1335/581/1

http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=APCPCS001335000001000581000001&idtype=cvips&gifs=yes&bypassSSO=1

Understanding the terahertz spectra of crystalline pharmaceuticals: Terahertz spectroscopy and solid-state density functional theory study of (S)-(+)-ibuprofen and (RS)-ibuprofen

2011-09-12T14:08:00.005+01:00

Journal of Pharmaceutical Sciences

Journal of Pharmaceutical Sciences

Matthew D. King,William D. Buchanan,Timothy M. Korter

Article first published online: 2 SEP 2010

Volume 100, Issue 3, pages 1116–1129, March 2011

Timothy M. Korter

Article first published online: 2 SEP 2010

Abstract

http://onlinelibrary.wiley.com/doi/10.1002/jps.22339/abstract

The potential applications of terahertz (THz) spectroscopy in the analysis of pharmaceutical products in their crystalline state have prompted the need for a more thorough understanding of the fundamental vibrational motions contributing to the THz spectra. The detection of variations in crystal structure and the reliable assignment of observed THz absorption features can be aided by the use of solid-state density functional theory (DFT). In this study, solid-state DFT with periodic boundary conditions was used to simulate the crystalline structure and assign the experimental THz spectra (10–90 cm⁻¹) of the enantiomerically pure and racemic forms of the common pharmaceutical compound ibuprofen. The results clearly demonstrate the capabilities of DFT methodologies to accurately reproduce the THz spectra of large complicated molecular systems and provide insight into the internal and external vibrational motions that form the basis of THz spectroscopy. © 2010 Wiley-Liss, Inc. and the American Pharmacists Association J Pharm Sci 100:1116–1129, 2011

3D THz Imaging of Heritage Objects

2011-09-07T13:00:00.004+01:00

Dr. Gianluca Pastorelli from University College London, in collaboration with TeraView Ltd., is giving a talk at Lacona IX concference on 3D THz imaging of Heritage Objects. The talk will be given at the British Museum, London, at 12.50 on Friday 9th of September.

All measurements on heritage objects analysed were done at TeraView Ltd. using a Spectra3000.

More information on the conference schedule can be found here.

Summary of paper "3D THZ Imaging of Heritage Objects"
7th September 2011

In the past few years, the way for Terahertz (THZ) technology into heritage science and conservation has been paved slowly but securely [1]. THZ radiation occupies the band between far-IR and microwaves (100 µm – 1 mm ~ 0.3 – 3 THz) and its recent advance is related to development of the necessary radiation sources and detectors.

The particular advantage of THZ radiation in comparison to other optical techniques is that it induces interactions between large molecules thus rendering itself particularly suitable for characterisation of macromolecular and supramolecular structures. THZ spectroscopy has been used for determination of glass transition temperature of polymers [2], has recently been shown to contain quantitative chemical information on polymeric materials [3] and spectral libraries have been built of a number of historically significant pigments [1].

In this work, we present a state-of-the-art THZ pulsed semiconductor-based imaging system developed specifically to monitor the thickness, uniformity and density of laminar and coated structures and to identify structural features such as cracks, dislocations and delaminations [4]. The emitter and receiver are based on a femtosecond pulsed laser system working in the range of 0.06 THz – 3 THz. The resolution of the system depends on the wavelength employed, and is typically in the range of several 10 µm.

The system operates on the principle of reflection of THZ pulses on (subsurface) phase boundaries, i.e. boundaries between materials with different refractive indices. Since both the emitter and the detector can be moved across a sample in the x-y direction, a 3D image of an object can be obtained.

Several case studies were selected to explore the capabilities of 3D THZ imaging, particularly plastic heritage objects. Using a degraded cellulose acetate (CA) negative, it was possible to image the typical delaminations observed as a consequence of advancing degradation. On other types of CA objects, depth distribution of cracks can be observed very effectively, while on polyurethane foam objects, the degradation process can be followed by imaging the cell shape and structure.

Due to its properties, combining a significant depth of penetration into opaque organic materials with a significant amount of chemical information, THZ imaging could significantly improve the present practice of structural and chemical monitoring of heritage objects of organic origin.

1. K. Fukunaga: Innovative Terahertz Spectroscopy and Imaging Technique for Art Conservation Science, e-Cons. Mag. no. 10, 2009, 30-42.

2. C. Jansen, S. Wietzke, O. Peters, M. Scheller, N. Vieweg, M. Salhi, N. Krumbholz, C. Jördens, T. Hochrein, M. Koch: Terahertz imaging: applications and perspectives, Appl. Opt. 49, 2010, E48-E57.

3. T. Trafela, M. Mizuno, K. Fukunaga, M. Strlič: THZ spectroscopy and chemometrics for quantitative characterisation of historic paper, LACONA IX, 2011.

4. L. Ho, R. Muller, K. C. Gordon, P. Kleinebudde, M. Pepper, T. Rades, Y. Shen, P. F. Taday, J. A. Zeitler: Monitoring the Film Coating Unit Operation and Predicting Drug Dissolution Using Terahertz Pulsed Imaging, J. Pharm. Sci. 98 (2009) 4866-4876.

Fault isolation in semiconductor product, process, physical and package failure analysis: Importance and overview

2011-09-01T11:34:00.003+01:00

citation from paper:

"... Recently TeraView together with an industry partner developed a Terahertz “TDR” called the Electro Optical Terahertz Pulsed Reflectometry (EOTPR) promising resolution of <10 μm....The EOTPR application on the real failure unit was presented at Electronic Components and Technology Conference (ECTC), 2010, and one of the case studies showed that the conventional TDR analysis was not able to isolate the defect, but with EOTPR, there was a difference between the waveform of the passing and failing unit..."

Fault isolation in semiconductor product, process, physical and package failure analysis: Importance and overview

JM Chin, V Narang, X Zhao, MY Tay, A Phoa… - Microelectronics Reliability, 2011

Jiann Min Chin^,^a^,, Vinod Narang^a, Xiaole Zhao^a, Meng Yeow Tay^a, Angeline Phoa^a, Venkat Ravikumar^a, Lwin Hnin Ei^a, Soon Huat Lim^a, Chea Wei Teo^a, Syahirah Zulkifli^a, Mei Chyn Ong^a and Ming Chuan Tan^a

^a Advanced Micro Devices Singapore, 508 Chai Chee Lane, Singapore 469032, Singapore

Received 29 June 2011;

accepted 30 June 2011.

Available online 9 August 2011.

^a Advanced Micro Devices Singapore, 508 Chai Chee Lane, Singapore 469032, Singapore

Received 29 June 2011;

accepted 30 June 2011.

Available online 9 August 2011.

Abstract

Failure analysis plays a major role in all areas of the semiconductor company especially during product development cycle, 1st silicon stage, or in wafer processes and fabrication as well as assembly and package development. Different companies have different FA flows but all FA steps will need to start with fault isolation. Fault isolation is the step to narrow down the focus area of a failing component or product to a manageable area that will allow us to (a) improve success of finding the defect that is causing the failure and, (b) significant speed up turn-around time for analysis.

This paper provides an overview of all the available failure analysis on fault isolation methodologies and tools, for device/product level and expanding to package/assembly and PFA level isolation. The aim of the paper is to provide sufficient depth to each topic including some case studies to emphasize the key points related to each methodology. The tutorial will also cover some future directions/roadmaps.

http://www.sciencedirect.com/science/article/pii/S0026271411002605#s0005

IEEE SENSORS 2011

2011-08-30T14:57:00.000+01:00

Welcome to IEEE SENSORS 2011

Detailed Conference Program now available!

Open Poster Submissions

Submissions now open!

Open Poster Submissions: This option is for authors who want to explore new
ideas and concepts with colleagues in the profession. Two-page abstracts are
submitted and are evaluated for appropriateness for the technical scope of the
conference. Companies are encouraged to present the technologies behind their
products; pure marketing presentations are not appropriate. Our historical acceptance rate for open posters is 85 to 95%.

Open Poster Abstract Deadlines and Due Dates (No Deadline Extensions)

Uploaded OP abstract submission: Tuesday, September 13, 2011
Notification (via email) to Authors: Friday, September 23, 2011
OP Acceptance from Authors: Tuesday, September 27, 2011

IEEE SENSORS 2011 is intended to provide a common forum for research scientists, engineers and practitioners throughout the world to present their latest research findings ideas, developments and applications in the area of sensors and sensing technology. IEEE SENSORS 2011 Conference will include keynote addresses by eminent scientists as well as Invited Speakers for the Topical Special sessions. The Conference solicits original and state-of-the-art contributions for both podium and regular poster sessions.

Topics of Interest Include but are not limited to:

Phenomena, Modeling, and Evaluation

Novel sensing principles, theory and modeling, sensor characterization, evaluation and testing, data handling and mining

Chemical and Gas Sensors

Materials Devices, electronic nose, electric tongue, continuous process control, test kits

Optical Sensors

Photonics and Opto-Electronics, Radiation, fiber sensors, Waveguide technology, novel lightsources and detectors, photonic bandgap Materials

Mechanical and Physical Sensors

Inertial pressure, tactile sensors, thermal, magnetic, and mass sensitive devices

Sensor/Actuator Systems

Sensor electronics, multi-sensor integrated systems, interfaces intelligent sensing, integrated sensoractuator systems

Sensor Networks

Components, Network Architecture, remote sensing, telemetry, communication, internet-based or other remote date acquisition, sensor control

Applications

Automotive, medical, environmental monitoring, consumer, security, military, nautical, aeronautical and space, robotics automation

Special Focus Sessions

Proposal submission deadline March 1, 2011

Tutorial Sessions

Proposal Submission Deadline March 1, 2011

Important Dates

March 1, 2011	Special Session Proposal Deadline
March 1, 2011	Tutorial submission Deadline
May 6, 2011	Abstract Submission Deadline
June 30, 2011	Author Notification
July 1, 2011	Registration Opens
July 30, 2011	Final Full paper submission (4 pages)
July 30, 2011	Presenting Author and Early-Bird Registration Deadline

Exhibition & Partnership Opportunities

The Conference exhibit area will provide your company or
organization with the opportunity to inform and display your latest
products, services, equipment, books, journals, and publications to
attendees from around the world. Please visit the website for further
information on exhibiting at this Conference.

Optional Event

We have reserved 160 seats at the Knappogue Castle Banquet on Saturday October 29th. The cost per person is a special rate of €45 per person ($65 USD). Please view the following link below for a description of the evening.

http://www.shannonheritage.com/Entertainment/KnappogueCastleBanquet/

If you wish to attend, please choose the available option when registering for the conference online.

Registration Now Open!

To register for 2011 IEEE SENSORS online please click here.

If you are needing to register by check or bank transfer please contact Rachel Edmunds, conference registrar at redmunds@conferencecatalysts.com.

TeraView's Spectra 3000 used in ionic liquid research

2011-08-09T15:40:00.001+01:00

The influence of hydrogen bonding on the physical properties of ionic liquids

Koichi Fumino, Tim Peppel, Monika Geppert-Rybczyńska, Dzmitry H. Zaitsau, Jochen K. Lehmann, Sergey P. Verevkin, Martin Köckerling and Ralf Ludwig

Phys. Chem. Chem. Phys., 2011, Advance Article

Abstract

Potential applications of ionic liquids depend on the properties of this class of liquid material. To a large extent the structure and properties of these Coulomb systems are determined by the intermolecular interactions among anions and cations. In particular the subtle balance between Coulomb forces, hydrogen bonds and dispersion forces is of great importance for the understanding of ionic liquids. The purpose of the present paper is to answer three questions: Do hydrogen bonds exist in these Coulomb fluids? To what extent do hydrogen bonds contribute to the overall interaction between anions and cations? And finally, are hydrogen bonds important for the physical properties of ionic liquids? All these questions are addressed by using a suitable combination of experimental and theoretical methods including newly synthesized imidazolium-based ionic liquids, far infrared spectroscopy, terahertz spectroscopy, DFT calculations, differential scanning calorimetry (DSC), viscometry and quartz-crystal-microbalance measurements. The key statement is that although ionic liquids consist solely of anions and cations and Coulomb forces are the dominating interaction, local and directional interaction such as hydrogen bonding has significant influence on the structure and properties of ionic liquids. This is demonstrated for the case of melting points, viscosities and enthalpies of vaporization. As a consequence, a variety of important properties can be tuned towards a larger working temperature range, finally expanding the range of potential applications.

Identification and Quantification of Polymorphism in the Pharmaceutical Compound Diclofenac Acid by Terahertz Spectroscopy and Solid-State Density Functional Theory

2011-08-05T16:56:00.001+01:00

Matthew D. King, William D. Buchanan, and Timothy M. Korter*

Department of Chemistry, Syracuse University, 1-014 Center for Science and Technology, Syracuse, New York 13244-4100, United States

http://pubs.acs.org/doi/full/10.1021/ac2001934

Polymorph detection and quantification in crystalline materials is a principle interest of the pharmaceutical industry. Terahertz (THz) spectroscopy can be used for such analytical applications since this technique is sensitive to the intermolecular interactions of molecules in the solid state. Understanding the fundamental nature of the lattice vibrational motions leading to absorptions in THz spectra is challenging, but may be achieved through computational approaches. In this study, the THz spectra of two diclofenac acid polymorphs were obtained by THz spectroscopy, and the vibrational characters of the observed absorptions were analyzed using solid-state density functional theory (DFT). The results demonstrate the quantitative capacity of THz spectroscopy and the reliability and utility of solid-state DFT in the calculation of low-frequency vibrational motions.

Tunable resonance enhancement of multi-layer terahertz metamaterials fabricated by parallel laser micro-lens array lithography on flexible substrates

2011-08-01T14:35:00.005+01:00

Z. C. Chen, N. R. Han, Z. Y. Pan, Y. D. Gong, T. C. Chong, and M. H. Hong

Optical Materials Express, Vol. 1, Issue 2, pp. 151-157 (2011) doi:10.1364/OME.1.000151

http://www.opticsinfobase.org/abstract.cfm?URI=ome-1-2-151

Abstract

Large-area split ring resonators (SRRs) array is fabricated by laser micro-lens array (MLA) lithography on flexible Polyethylene Naphthalate (PEN) substrates. Multi-layer metamaterials are formed by stacking and bonding several layers of the laser fabricated metamaterials together. The resonance of the multi-layer metamaterials is enhanced significantly as compared to the single-layer metamaterials. The roll-off value of the half-wavelength resonant dip, which reflects the strength of resonance, increases significantly from 4.9 to 11.2 as the layer number increases from 1 to 5. A logarithm relationship between the amplitude of the resonant dip and the layer number is also studied, which indicates a flexible method to tune the strength of resonance by changing the layer number. The multi-layer metamaterials with the enhanced resonance can be used to make narrow band terahertz filters.

“The samples are characterized by a Terahertz Time Domain Spectroscopy (THz-TDS,

TPS3000, Teraview Inc.) in transmission mode at a normal incidence. The electric field of the

incident terahertz wave is aligned parallel to the gap-bearing side of the SRRs as illustrated in

Fig. 1 (B). All the transmission spectra of the samples with different layer numbers are

normalized against the reference transmission spectrum of Nitrogen gas environment [30]”

Second international terahertz (THz) application workshop 11- 13 October 2011 Dayton, Ohio - REMINDER

2011-07-28T10:32:00.003+01:00

ONLY 3 SPACES LEFT!

This workshop aims at bringing together new and existing terahertz instrumentation users. It is an opportunity to share knowledge and understating of the technology.

THz systems will be used for hands on demonstration of the equipment. Data processing and analysis techniques will be also extensively discussed.

The workshop will span throughout two days, with the opportunity of remaining a third day on –site for further hands-on demonstrations.

Throughout the two days there will be extensive opportunities for the users to discuss their projects in detail and to establish links to experts in this field.

Topics will include:

•Introduction to terahertz spectroscopy

•Data Analysis

•Terahertz imaging

•Hands-on use of terahertz equipment

Anyone wishing to to learn more about terahertz applications should attend this workshop!

Find more information on TeraView's website:

http://www.teraview.com/downloads/workshop2_leaflet.pdf

Terahertz Pulsed Imaging as a PAT Tool for Evaluating the Effect of Coating Methods and Application of Stress Conditions on Applied Film Quality

2011-07-27T10:30:00.001+01:00

In Proceedings of the 1st Electron. Conf. Pharm. Sci.

Sciforum Electronic Conferences Series, 2011, b003:1-10

Haaser, M.; Gordon, K.; Pepper, M.; Rades, T.; Rantanen, J.; Strachan, C.; Taday, P.; Zeitler, J.; Naelapää, K.

http://www.sciforum.net/presentation/517

Abstract: Film coating process development and applied film quality have been in the focus of the pharmaceutical industry for decades. Many techniques have been used to investigate and characterise complex film coating structures. Recently, terahertz pulsed imaging (TPI) has been introduced to study and understand the quality of film coatings. In this study, the effect of two different film-coaters , a fluid bed (Combi Coata, Model CC1/LAB, Niro Atomizer, Denmark) and a drum coater (Hi-Coater, HCT 20, Lödige Mascinenbau GmbH, Germany) on the applied film quality was determined by TPI (TPI imaga 2000, TeraView Ltd, Cambridge, UK). In addition to the coating application under recommended conditions, stress conditions were applied and investigated; e.g. high spray rate, simulated nozzle block during the coating process, and varying curing times after coating. From the terahertz time-domain waveforms, maps of the terahertz electricfield peak strength (TEFPS), interface index (TII) and coating thickness (CT) were successfully derived. SEM was used as a complimentary technique to increase the insight into the various coating characteristics. The results showed lower TEFPS values for samples coated by the fluid bed device, indicating a rougher coating surface than samples coating by the drum coater. Although the amount of coating applied was found to be the same, the mean CT for the fluid bed coated samples was higher. Furthermore, it was possible to distinguish an interface between the subsequent coating layers in the CT maps (generated by a coating liquid application stop), which couldn't be resolved by SEM for all samples. The different process conditions in both pieces of equipment are considered to be reason for this observation, as well as the difference found in the TII values (interface coating/core) for tablets coated by the two methods, respectively. In good agreement with previous studies, the overall thickness of the coating layer was systematically thinner around the centre band compared to the top and bottom surfaces. TPI can be considered to be a sophisticated PAT tool for gathering information, and increasing the understanding of complex film coating structures.

Keywords: Terahertz Pulsed Imaging (TPI), film quality, coating

terahertz spectroscopy and imaging

Low Energy Electrodynamics in Solids LEES 12

Topics

Organizers

Chairs

Program Committee

International Advisory Committee

Important Dates

Abstracts Due: March 5, 2012Acceptance Notification: March 23, 2012Early Registration Deadline (reduced fee): April 23, 2012Late Registration: Begins April 24, 2012LEES 2012 Conference: July 22 - 27, 2012For more information click herehttp://www.lees2012.org/index.html

APS March Meeting 2012

Classification of terahertz-pulsed imaging data from excised breast tissue

New Centre for Terahertz Science and Engineering (CTSE)

TeraView at the International Forum on Terahertz Spectroscopy and Imaging - March 2012

3rd EOS Topical Meeting on Terahertz Science & Technology (TST 2012)

Topics

Keynote Speaker

Masterclass Speakers

Invited Speakers

3D-Tablettenprüfung mittels Terahertz

Properties of InxGa1−xN films in terahertz range

Dielectric Properties of Monoclonal Antibodies to Influenza Using Terahertz Spectroscopy

TeraView at the International Forum on Terahertz Spectroscopy and Imaging - March 2012

International Forum on Terahertz Spectroscopy and Imaging

TeraView hiring for summer intern job - Technical Marketing

TeraView expands U.S. presence in Dayton

Prediction of dissolution time and coating thickness of sustained release formulations using Raman spectroscopy and terahertz pulsed imaging

Abstract

Keywords

Structures and characterization of m-nisoldipine polymorphs - CrystEngComm (RSC Publishing)

Structures and characterization of m-nisoldipine polymorphs

Intel terahertz supplier secures $5.5 million funds

TeraView listed among companies that dominate EU fundraising in January

Business Weekly writes about TeraView

Article on TeraView on CambridgeFirst!

TeraView Secures $5.5m to Fund Growth in Key Markets

TeraView's booth at Photonics West!

Terahertz absorption spectra of benzene-1,2-diol, benzene-1,3-diol and benzene-1,4-diol

Abstract

Graphical abstract

Highlights

Job Post - Applications and Customer Support Scientist

Job Position at TeraView: Service Engineer

Photonics West: TeraView will be part of the companies in the UK cluster

TeraView at "Lasers & Photonics Marketplace" seminar

Photonics West: Dr. Phil Taday's talk: Real-world applications of terahertz pulsed technology

Real-world applications of terahertz pulsed technology

Follow us on Twitter!

The ideal tool for researching metamaterials

Job opportunity at TeraView

Multiferroic transition-metal oxides: Analysis of the polar groundstates by dielectric spectroscopy

Maskless multiple-beam laser lithography for large-area nanostructure/microstructure fabrication

Abstract

STRUCTURAL APPLICATIONS OF TERAHERTZ SPECTROSCOPY

First Sale in Russia for TeraView

About Terahertz

Collective Mode Frequency Shifts in L-Serine and a Series of Isotopologues in the Terahertz Regime

AN EXPLORATION OF THE UTILITIES OF TERAHERTZ WAVES FOR THE NDE OF COMPOSITES

AN EXPLORATION OF THE UTILITIES OF TERAHERTZ WAVES FOR THE NDE OF COMPOSITES

AIP Conf. Proc. -- June 23, 2011 -- Volume 1335, pp. 533-540REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Volume 30A; Volume 30B; doi:10.1063/1.3591897

Explosives characterization in terahertz range (Proceedings Paper)

Author(s): I. Maestrojuán; I. Palacios; D. Etayo; J. C. Iriarte; J. Teniente; I. Ederra; R. GonzaloDate: 13 October 2011

Paper Abstract

Millimetre Wave and Terahertz Sensors and Technology IV, Keith A. Krapels;Neil A. Salmon; Eddie Jacobs, Editors, 81880N

TeraView at the 37TH INTERNATIONAL SYMPOSIUM FOR TESTING & FAILURE ANALYSIS

Terahertz Time-Domain Spectroscopy of Solid Samples: Principles, Applications, and Challenges

... Different ranges are specified in both the peer-reviewed literature (2–4) and documentation from instrument vendors (55. TeraView. “Terahertz radiation”. Available at: http://teraview.co.uk/terahertz/...

DOI:10.1080/05704928.2011.614305Ryan M. Smitha & Mark A. Arnoldapages 636-679Available online: 07 Oct 2011

Abstract

ELECTRICAL CONDUCTIVITY AND ELECTROMAG-NETIC SHIELDING EFFECTIVENESS OF SILICONE RUBBER FILLED WITH FERRITE AND GRAPHITE POWDERS

Our second International Terahertz Hands-on Workshop has been a great success!

Terahertz pulsed imaging in vivo: measurements and processing methods

2nd International Workshop - spaces now full

THz Reﬂection Spectroscopy of Explosives Measured by Time Domain Spectroscopy

International THz Conference - November 24-25, 2011 – Villach, Austria

International THz Conference -November 24-25, 2011 – Villach, Austria

SIGNAL MODELING IN THE FAR-INFRARED REGION FOR NONDESTRUCTIVE EVALUATION APPLICATIONS

AIP Conf. Proc. -- June 23, 2011 -- Volume 1335, pp. 581-588REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Volume 30A; Volume 30B; doi:10.1063/1.3591903

Understanding the terahertz spectra of crystalline pharmaceuticals: Terahertz spectroscopy and solid-state density functional theory study of (S)-(+)-ibuprofen and (RS)-ibuprofen

Journal of Pharmaceutical Sciences

Abstract

Abstracts Due: March 5, 2012
Acceptance Notification: March 23, 2012
Early Registration Deadline (reduced fee): April 23, 2012
Late Registration: Begins April 24, 2012
LEES 2012 Conference: July 22 - 27, 2012

For more information click here
http://www.lees2012.org/index.html

International Forum
on Terahertz Spectroscopy and Imaging

AIP Conf. Proc. -- June 23, 2011 -- Volume 1335, pp. 533-540
REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Volume 30A; Volume 30B; doi:10.1063/1.3591897

Author(s): I. Maestrojuán; I. Palacios; D. Etayo; J. C. Iriarte; J. Teniente; I. Ederra; R. Gonzalo
Date: 13 October 2011

DOI:
10.1080/05704928.2011.614305
Ryan M. Smith^a & Mark A. Arnold^a
pages 636-679
Available online: 07 Oct 2011

AIP Conf. Proc. -- June 23, 2011 -- Volume 1335, pp. 581-588
REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Volume 30A; Volume 30B; doi:10.1063/1.3591903