William E. Nixon

TL;DR: In this article, the authors presented full-body terahertz images of human subjects with concealed weapons at 1.56THz and 350GHz using coherent active radar measurement techniques.

TL;DR: A coherent transceiver using a THz quantum cascade (TQCL) Laser as the transmitter and an optically pumped molecular laser as the local oscillator has been used, with a pair of Schottky diode mixers in the receiver and reference channels, to acquire high-resolution images of fully illuminated targets, including scale models and concealed objects.

TL;DR: In this article, a fully polarimetric compact range operating at 524 GHz was developed for obtaining Ka-band radar cross-section (RCS) measurements on 1:16th scale-model targets.

TL;DR: In this paper, the authors provide an overview of several terahertz optical components such as frequency selective filters, laser output couplers, artificial dielectrics, and electromagnetic absorbbers.

TL;DR: It is demonstrated that a short hollow dielectric tube can act as a dielectic waveguide and transform the multimode, highly diverging terahertz quantum cascade laser beam into the lowest order dielectrics waveguide hybrid mode, EH(11), which then couples efficiently to the free-space Gaussian mode, TEM(00).