Loss-induced nonreciprocity  

作　　者：Xinyao Huang Cuicui Lu Chao Liang Honggeng Tao Yong-Chun Liu 

机构地区：[1]State Key Laboratory of Low-Dimensional Quantum Physics,Department of Physics,Tsinghua University,Beijing 100084,China [2]Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education,Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems,School of Physics,Beijing Institute of Technology,Beijing 100081,China [3]Collaborative Innovation Center of Light Manipulations and Applications,Shandong Normal University,Jinan 250358,China [4]Frontier Science Center for Quantum Information,Beijing 100084,China

出　　处：《Light(Science & Applications)》2021年第2期256-263,共8页光（科学与应用)（英文版）

基　　金：supported by the Key-Area Research and Development Program of Guangdong Province(Grant number 2019B030330001);the National Natural Science Foundation of China(NSFC)(Grant numbers 92050110,91736106,11674390,91836302,91850117,and 11654003);X.H is partly supported by the China Postdoctoral Science Foundation(BX20190179 and 2020M670277).

摘　　要：Nonreciprocity is important in both optical information processing and topological photonics studies.Conventional principles for realizing non reciprocity rely on magnetic fields,spatiotemporal modulation,or nonlinearity.Here we propose a generic principle for generating nonreciprocity by taking advantage of energy loss,which is usually regarded as harmful.The loss in a resonance mode induces a phase lag,which is independent of the energy transmission direction.When multichannel lossy resonance modes are combined,the resulting interference gives rise to nonreciprocity,with different coupling strengths for the forward and backward directions,and unidirectional energy transmission.This study opens a new avenue for the design of nonreciprocal devices without stringent requirements.

关 键 词：BACKWARD GENERATING DIRECTIONS 

分 类 号：O43[机械工程—光学工程]