Information‑entropy enabled identifying topological photonic phase in real space  

作　　者：Rui Ma Qiuchen Yan Yihao Luo Yandong Li Xingyuan Wang Cuicui Lu Xiaoyong Hu Qihuang Gong 

机构地区：[1]State Key Laboratory for Mesoscopic Physics&Department of Physics,Collaborative Innovation Center of Quantum Matter&Frontiers Science Center for Nano‑Optoelectronics,Peking University,Beijing 100871,China [2]The MOE Key Laboratory of Weak‑Light Nonlinear Photonics,TEDA Applied Physics Institute and School of Physics,Nankai University,Tianjin 300457,China [3]College of Mathematics and Physics,Beijing University of Chemical Technology,Beijing 100029,China [4]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 [5]Peking University Yangtze Delta Institute of Optoelectronics,Nantong 226010,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：《Frontiers of Optoelectronics》2024年第2期1-9,共9页光电子前沿（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.92150302,12274031 and 62175009);the Innovation Program for Quantum Science and Technology(No.2021ZD0301500);Beijing Institute of Technology Research Fund Program for Teli Young Fellows,Beijing Institute of Technology Science and Technology Innovation Plan Innovative Talents Science and Technology Funding Special Plan(2022CX01006);Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics(No.KF202114);the Natural Science Foundation of Hebei Province(No.A2021201009);China Postdoctoral Science Foundation(2023M740121).

摘　　要：The topological photonics plays an important role in the fields of fundamental physics and photonic devices.The traditional method of designing topological system is based on the momentum space,which is not a direct and convenient way to grasp the topological properties,especially for the perturbative structures or coupled systems.Here,we propose an interdisciplinary approach to study the topological systems in real space through combining the information entropy and topological photonics.As a proof of concept,the Kagome model has been analyzed with information entropy.We reveal that the bandgap closing does not correspond to the topological edge state disappearing.This method can be used to identify the topological phase conveniently and directly,even the systems with perturbations or couplings.As a promotional validation,Su-Schrieffer-Heeger model and the valley-Hall photonic crystal have also been studied based on the information entropy method.This work provides a method to study topological photonic phase based on information theory,and brings inspiration to analyze the physical properties by taking advantage of interdisciplinarity.

关 键 词：Information entropy Kagome model Topological photonic phase 

分 类 号：O43[机械工程—光学工程]