Terahertz reflection imaging using Kirchhoff migration

We describe a new imaging method that uses single-cycle pulses of terahertz (THz) radiation. This technique emulates data-collection and image-process ing procedures developed for geophysical prospecting and is made possible b y the availability of fiber-coupled THz receiver antennas. We use a simple migration procedure to solve the inverse problem; this permits us to recons truct the location and shape of targets. These results demonstrate the feas ibility of the THz system as a test-bed for the exploration of new seismic processing methods involving complex model systems. (C) 2001 Optical Societ y of America.