Detection of explosives from residual traces is the key for preventing unintended use of these materials.  We have reported terahertz spectra of common explosives: TNT, PETN and RDX.  The temporal signals are found distinctively different in both magnitude and shape, exhibiting unique features for identifying the compounds.  In this report we have studied a derivative, DNT, on different backgrounds such as polyethylene, glass, and paper with goal to extract common features in broadband terahertz regime.  These results will be present with a comparison with the backgrounds.  A protocol will then be worked out to normalize the distance dependence between the target and the detection system.  Given the sensitivity of terahertz wavelengths, it seems feasible to accomplish remote detection of explosives with better accuracy.  This talk will discuss details with exemplary data.

Explosives traces identification by terahertz spectroscopy

244th National Meeting (2012)

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