Research on Terahertz Waveplates Constructed with Non-birefringent Material

As terahertz range used to be a gap, it has been researched more and more nowadays. This paper aims to design a half wave plate and a quarter wave plate operating at the terahertz frequency. This paper introduces the background of the terahertz technology, wave plate. Based on the background, the equations which are related to the optical parameters used in the wave plate design and data processing are also given. Further details on the structure and simulation process of the wave plate are given in the paper. Through the calculation, simulation and design modifying, the half wave plate finally reaches the phase difference of 179.86 degrees while the quarter wave plate reaches the phase difference of 90.15 degrees which are approaching to the theoretical values.