Reduction of polarization deviation effects in terahertz splitter

Abstract

Because the polarization state can reflect more information, the development of terahertz remote sensing and communication technology, there is an urgent need for polarization insensitive terahertz regulatory devices. In this paper, a linear terahertz depolarization splitter is designed based on the transfer matrix method, which combines the symmetric structure with the matched material to obtain a material combination with very little polarization deviation. Statistical results show that this design has excellent performance of 51.0586% transmittance and low polarization degree of 0.0016 for 2.5 ThZ wave at 45 degrees of oblique incidence. Moreover, it has excellent performance of little transmission deviation and phase shift in the range of 0–55 degrees of incident Angle.