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Proceedings Paper

Terahertz reflection spectroscopy for the detection of explosives
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Paper Abstract

Terahertz (THz) technology has been demonstrated as a promising tool for detection of explosives and is being developed for aviation screening and sensing of improvised explosive devices. THz radiation is attractive for many applications due to its ability to penetrate through a wide range of dielectric materials including clothing, paper, cardboard, plastics, and wood. Of course, metals block THz waves as is the case for microwave, IR, and visible light. Our work has involved investigating the reflection spectroscopy of a variety of materials including explosives such as RDX and PETN, plastic explosive taggants such as DMDNB, and other organic materials. We have also investigated the changes of the reflection spectra in varying grades of sucrose. Spectral differences are observed between three grades of crystalline sugar in the region from 0.1 to 1 THz. By exploiting the unique spectral features, the discrimination capabilities of THz reflection spectroscopy points to the broad applicability of identifying a wide variety of materials.

Paper Details

Date Published: 14 February 2008
PDF: 8 pages
Proc. SPIE 6893, Terahertz Technology and Applications, 689305 (14 February 2008); doi: 10.1117/12.775548
Show Author Affiliations
Megan R. Leahy-Hoppa, The Johns Hopkins Univ. (United States)
Michael J. Fitch, The Johns Hopkins Univ. (United States)
Robert Osiander, The Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 6893:
Terahertz Technology and Applications
Kurt J. Linden; Laurence P. Sadwick, Editor(s)

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