Research on the effect of incident polarization phase on transverse spin splitting of reflected beam

Abstract

In this work, the theoretical relationship model between the incident polarization phase and transverse spin splitting (TSS) shifts of photonic spin Hall effect (PSHE) is established. Based on the established model, the effect of the incident polarization phase on the TSS is systematically studied, and several characteristic laws are summarized. These findings can help people better understand PSHE. In addition, it is found that, no matter what the incident angle and polarization angle are, the TSS shift at polarization phase equal to ±90° is larger than that at other polarization phases. It can even reach several microns under certain incident angle and polarization angle, and is almost an order of magnitude larger than the usual TSS shift, which is generally tens to hundreds of nanometers. This provides a new way for enhancing PSHE. Furthermore, when the polarization phase is 90° or −90°, under a certain polarization angle, slightly adjust the polarization angle, the TSS shift will change sharply and its direction will be reversed. This interesting finding has great application value in the field of photon manipulation.