Nonreciprocal amplification transition in a topological photonic network  

作　　者：MINGSHENG TIAN FENGXIAO SUN KAIYE SHI HAITAN XU QIONGYI HE WEI ZHANG 

机构地区：[1]State Key Laboratory for Mesoscopic Physics,School of Physics,Frontiers Science Center for Nano-optoelectronics,and Collaborative Innovation Center of Quantum Matter,Peking University,Beijing 100871,China [2]Department of Physics,Renmin University of China,Beijing 100872,China [3]School of Materials Science and Intelligent Engineering,Nanjing University,Suzhou 215163,China [4]Shishan Laboratory,Nanjing University,Suzhou 215163,China [5]School of Physical Sciences,University of Science and Technology of China,Hefei 230026,China [6]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China [7]Hefei National Laboratory,Hefei 230088,China [8]Beijing Academy of Quantum Information Sciences,Beijing 100193,China

出　　处：《Photonics Research》2023年第5期852-857,共6页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(11974031, 11975026, 12074428, 12125402, 12147148);Beijing Municipal Natural Science Foundation (Z180013,Z190005);National Key Research and Development Program of China (2018YFA0306501);Key R&D Program of Guangdong Province (2018B030329001);Innovation Program for Quantum Science and Technology (2021ZD0301702);China Postdoctoral Science Foundation (2020M680186)。

摘　　要：We studied the transport properties of a driven-dissipative photonic network, where multiple photonic cavities are coupled through a nonreciprocal bus with unidirectional transmission. For short-range coupling between the cavities, the occurrence of nonreciprocal amplification can be linked to a topological phase transition of the underlying dynamic Hamiltonian. However, for long-range coupling, we show that the correspondence between the nonreciprocal amplification transition and the topological phase transition breaks down as the transition conditions deviate significantly from each other. We found the exact transition condition for nonreciprocal amplification, supported by analytical calculation and numerical simulation. We also investigated the stability, the crossover from short-to long-range coupling, and the bandwidth of the nonreciprocal amplification. Our work has potential applications in signal transmission and amplification, and also paves the way to study other topological and non-Hermitian systems with long-range coupling and nontrivial boundary effects.

关 键 词：reciprocal TOPOLOGICAL TRANSITION 

分 类 号：O469[理学—凝聚态物理]