Abstract

THz impulse ranging¹ is used to measure the late time response of dielectric targets. The unparalleled time resolution of these measurements provides physical insight into scattering phenomena. We report the highest time resolution ranging measurement of the late time response target to date. Using THz impulse ranging we observe for the first time well-resolved features from the delayed time response, predicted from a geometrical optics model. These results permitted the first direct measurement of surface wave velocities on dielectric targets.

© 1996 Optical Society of America