Non-Hermitian control of confined optical skyrmions in microcavities formed by photonic spin-orbit coupling

作     者：XIAOXUAN LUO YIN CAI XIN YUE WEI LIN JINGPING ZHU YANPENG ZHANG FENG LI 

作者机构：Key Laboratory for Physical Electronics and Devices of the Ministry of Education&Shaanxi Key Laboratory of Information Photonic TechniqueSchool of Electronic Science and EngineeringFaculty of Electronic and Information EngineeringXi’an Jiaotong UniversityXi’an 710049China 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2023年第11卷第4期

页      面：610-621页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China(61890961,12074303,11804267,12174302,11904279,62177813) Shaanxi Key Science and Technology Innovation Team(2021TD-56) 

主　　题：coupling confined circular 

摘      要：Optical skyrmions formed by photonic spin–orbit(SO)coupling are of significant interest in high-dimensional optical information *** report the formation mechanism and non-Hermitian properties of skyrmionlike states in a circular confinement potential with photonic SO coupling,which is preferably realized in a concave-planar microcavity *** show that the effective photonic gauge field leads to two split manifolds of degenerate skyrmions whose spin textures can be controlled via the non-Hermitian properties by introducing circularly polarized gain and loss,exhibiting dramatically discrepant evolutions at the two sides of the exceptional point(EP).Furthermore,the lifetime degeneracy can be lifted by spatially inhomogeneous pumping according to the non-Hermitian mechanism,enabling the possibility for the skyrmion *** introducing shape asymmetry of the confinement potential,a double EP evolution can be achieved,which allows non-Hermitian control of the SO coupled states with higher degrees of *** results open the way for the non-Hermitian control of photonic spin in confined systems,which would be of great significance for the fundamentals of advanced optical information processing.