Cross-Polarization Effects Near the Exceptional Points(Invited)
We construct a propagation model of Gaussian beam in non-Hermitian system and explore the cross-polarization effects near the exceptional points in parity-time symmetric(PT-symmetric)structure.The results show that when the light beam is incident near the exceptional points,the cross-polarization component shows a double-peak intensity distribution similar to the first-order Hermite-Gaussian model.Conversely,the original polarization component shows a double-peak intensity distribution similar to the single circularly polarized components,which are perpendicular to the cross-polarization component.By adjusting the incident polarization angle,a significant rotation of the cross-polarization component near the exceptional point is revealed.Moreover,the direction of rotation of the cross-polarization component is reversed when the system crosses the exceptional points,providing a novel idea to precisely explore the position of the exceptional points.Finally,the strong cross-polarization effects near the exceptional points provide a theoretical guide for enhancing the photonic spin Hall effect.
NETL
NSTL
万方数据
