Linear and nonlinear photonic spin Hall effect induced by analog circular birefringence of Bessel-like beams  

作　　者：YANKE LI YU ZOU SHENG LIU PENG LI BINGYAN WEI JIANLIN ZHAO 

机构地区：[1]Key Laboratory of Light Field Manipulation and Information Acquisition,Ministry of Industry and Information Technology,and Shaanxi Key Laboratory of Optical Information Technology,School of Physical Science and Technology,Northwestern Polytechnical University,Xi’an 710129,China [2]Collaborative Innovation Center of Light Manipulation and Applications,Shandong Normal University,Jinan 250358,China

出　　处：《Photonics Research》2023年第9期1553-1561,共9页光子学研究（英文版）

基　　金：National Key Research and Development Program of China(2022YFA1404800);National Natural Science Foundation of China(12074312,12174309,12074313);Fundamental Research Funds for the Central Universities(3102019JC008)。

摘　　要：The spin Hall effect of a light beam is essentially a product of circular birefringence but is rarely demonstrated.Here,we provide a scheme for initiating off-axis circular birefringence based on the spin-dependent wave vector bifurcation of Bessel beams via a single liquid crystal Pancharatnam–Berry phase element.The tilted Bessel beam shows a detectable photonic spin Hall effect.By introducing the nonlinear propagation trajectories,the spin Hall effect is greatly enhanced.More surprisingly,the two spin states exactly propagate along the scaled trajectories,enabling flexible control of the spin separation.This phenomenon is also applicable to other Bessel-like beams with nonlinear trajectories,which have been already reported.

关 键 词：BESSEL CIRCULAR nonlinear 

分 类 号：O43[机械工程—光学工程]