Anti-parity-time symmetry enabled on-chip chiral polarizer

作     者：YANXIAN WEI HAILONG ZHOU YUNTIAN CHEN YUNHONG DING JIANJI DONG XINLIANG ZHANG YANXIAN WEI;HAILONG ZHOU;YUNTIAN CHEN;YUNHONG DING;JIANJI DONG;XINLIANG ZHANG

作者机构：Wuhan National Laboratory for OptoelectronicsSchool of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhan 430074China Department of Photonics EngineeringTechnical University of Denmark2800 LyngbyDenmark SiPhotonIC ApS2830 VirumDenmark 

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

年 卷 期：2022年第10卷第1期

页      面：76-83页

核心收录：

学科分类：08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 081102[工学-检测技术与自动化装置] 0811[工学-控制科学与工程] 

基　　金：National Natural Science Foundation of China(61805090, 62075075) National Key Research and Development Project of China (2018YFB2201901) 

主　　题：chiral symmetry parity 

摘      要：Encircling an exceptional point(EP) in a parity-time(PT) symmetric system has shown great potential for chiral optical devices,such as chiral mode switching for symmetric and antisymmetric ***,to our best knowledge,chiral switching for polarization states has never been reported,although chiral polarization manipulation has significant applications in imaging,sensing,communication,***,inspired by the anti-PT symmetry,we demonstrate,for the first time to our best knowledge,an on-chip chiral polarizer by constructing a polarization-coupled anti-PT symmetric *** transmission axes of the chiral polarizer are different for forward and backward propagation.A polarization extinction ratio of over 10 dB is achieved for both propagating ***,a telecommunication experiment is performed to demonstrate the potential applications in polarization encoding *** provides a novel functionality for encircling-an-EP parametric evolution and offers a new approach for on-chip chiral polarization manipulation.