Abstract

The precise measurement of optical constants of dielectric materials at THz-frequencies is important in applied as well as basic physics. The rapidly growing applications of time-domain THz-spectroscopy require a precise knowledge of the optical constants of materials which are either used as highly transparent windows or strong absorbers for THz-radiation Due to the lack of suitable broadband phase-sensitive measurement techniques in the past reliable data in the frequency range between 0 1 and 3 THz is sparse [1] In basic physics time-domain THz-transmission spectroscopy (TDTTS) has been identified as an important new technique because it covers the frequency range where the transition from vibrational to translational motion of mobile ions in glasses occurs.

© 2000 IEEE