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Terahertz Material Detection From Diffuse Surface Scattering, Scott Schecklman, Lisa M. Zurk, Samuel C. Henry, Gabriel Paul Kniffin
Terahertz Material Detection From Diffuse Surface Scattering, Scott Schecklman, Lisa M. Zurk, Samuel C. Henry, Gabriel Paul Kniffin
Electrical and Computer Engineering Faculty Publications and Presentations
The potential for terahertz (THz) spectroscopy to detect explosives and other materials of interest is complicated by rough surface scattering. Our previous work has demonstrated that by averaging over diffuse observation angles and surfaces, spectral features could be recovered from laboratory measurements and numerical computer simulations. In addition to averaging, a low-pass cepstrum filter was used to reduce noise due to the random rough surface. This paper expands on these concepts by using the cepstrum of both the random rough surface and the material properties of the target material to choose an optimal cutoff frequency for the filter. The utility …