Recent advances in terahertz imaging |
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| Authors: | DM Mittleman M Gupta R Neelamani RG Baraniuk JV Rudd M Koch |
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| Institution: | (1) Electrical and Computer Engineering Department, Rice University, MS-366, 6100 Main St., Houston, TX 77005, USA (Fax: +1-713/524-5237, E-mail: daniel@rice.edu), US;(2) Picometrix, Inc., P.O. Box 130243, Ann Arbor, MI 48113, USA, US;(3) Institut für Hochfrequenztechnik, Schleinitzstr. 22, Technical University of Braunschweig, D-38106 Braunschweig, Germany, DE |
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| Abstract: | We review recent progress in the field of terahertz “T-ray” imaging. This relatively new imaging technique, based on terahertz
time-domain spectroscopy, has the potential to be the first portable far-infrared imaging spectrometer. We give several examples
which illustrate the possible applications of this technology, using both the amplitude and phase information contained in
the THz waveforms. We describe the latest results in tomographic imaging, in which waveforms reflected from an object can
be used to form a three-dimensional representation. Advanced signal processing tools are exploited for the purposes of extracting
tomographic results, including spectroscopic information about each reflecting layer of a sample. We also describe the application
of optical near-field techniques to the THz imaging system. Substantial improvements in the spatial resolution are demonstrated.
Received: 29 January 1999 / Published online: 7 April 1999 |
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| Keywords: | PACS: 07 57 Pt 42 65 Re |
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