Omnidirectional terahertz mirrors: A key element for future terahertz communication systems

Abstract
We present an omnidirectional mirror for the terahertz range made from polypropylene and high-resistivitysilicon. The structure is characterized by time-domain terahertz spectroscopy. The experimental data are in good agreement with transfer matrix calculations. In the frequency band between 319 and 375 GHz the mirror is highly reflecting for all incidence angles and s as well as p polarization.