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Applied Physics Letters / Volume 95 / Issue 23 / LASERS, OPTICS, AND OPTOELECTRONICS

Appl. Phys. Lett. 95, 231112 (2009); http://dx.doi.org/10.1063/1.3271030 (3 pages)

Terahertz pulsed spectroscopic imaging using optimized binary masks

Y. C. Shen1, L. Gan2, M. Stringer3, A. Burnett3, K. Tych3, H. Shen1, J. E. Cunningham3, E. P. J. Parrott4, J. A. Zeitler4, L. F. Gladden4, E. H. Linfield3, and A. G. Davies3

1Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, United Kingdom
2Electronic and Computer Engineering, School of Engineering and Design, Brunel University, Uxbridge UB8 3PH, United Kingdom
3School of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom
4Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB2 3RA, United Kingdom

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(Received 5 October 2009; accepted 8 November 2009; published online 10 December 2009)

We report the development of a terahertz pulsed spectroscopic imaging system based on the concept of compressive sensing. A single-point terahertz detector, together with a set of 40 optimized two-dimensional binary masks, was used to measure the terahertz waveforms transmitted through a sample. Terahertz time- and frequency-domain images of the sample comprising 20×20 pixels were subsequently reconstructed. We demonstrate that both the spatial distribution and the spectral characteristics of a sample can be obtained by this means. Compared with conventional terahertz pulsed imaging, no raster scanning of the object is required, and ten times fewer terahertz spectra need be taken. It is therefore ideal for real-time imaging applications.

© 2009 American Institute of Physics

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KEYWORDS and PACS

Keywords

image reconstruction, terahertz spectroscopy, terahertz wave detectors, terahertz wave imaging, terahertz wave spectra

PACS

  • 07.57.Pt

    Submillimeter wave, microwave and radiowave spectrometers; magnetic resonance spectrometers, auxiliary equipment, and techniques

  • 07.05.Pj

    Image processing

  • 42.30.Wb

    Image reconstruction; tomography

  • 78.70.Gq

    Microwave and radio-frequency interactions

  • 84.40.-x

    Radiowave and microwave (including millimeter wave) technology

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3271030

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    Y. C. Shen, P. C. Upadhya, E. H. Linfield, H. E. Beere, and A. G. Davies, Appl. Phys. Lett. 82, 2350 (2003)APPLAB000082000014002350000001.

    W. Chan, K. Charan, D. Takhar, K. Kelly, R. Baraniuk, and D. Mittleman, Appl. Phys. Lett. 93, 121105 (2008)APPLAB000093000012121105000001.

    W. L. Chan, H. T. Chen, A. J. Taylor, I. Brener, M. J. Cich, and D. M. Mittleman, Appl. Phys. Lett. 94, 213511 (2009)APPLAB000094000021213511000001.

    Y. C. Shen, P. C. Upadhya, E. H. Linfield, H. E. Beere, and A. G. Davies, Appl. Phys. Lett. 83, 3117 (2003)APPLAB000083000015003117000001.

    E. R. Brown, J. E. Bjarnason, A. M. Fedor, and T. M. Korter, Appl. Phys. Lett. 90, 061908 (2007)APPLAB000090000006061908000001.


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