Realization of Topology-Controlled Photonic Cavities in a Valley Photonic Crystal

作     者：Bei Yan Baoliang Liao Fulong Shi Xiang Xi Yuan Cao Kexin Xiang Yan Meng Linyun Yang Zhenxiao Zhu 

作者机构：State Key Laboratory of Optical Fiber and Cable Manufacturing Technology Department of Electronic and Electrical Engineering Guangdong Key Laboratory of Integrated Optoelectronics Intellisense Southern University of Science and Technology Shenzhen 518055 China Hubei Province Key Laboratory of Systems Science in Metallurgical Process and College of Science Wuhan University of Science and Technology Wuhan 430081 China Guangdong Province Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics Technology Jinan University Guangzhou 510632 China School of Physics & State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen University Guangzhou 510275 China School of Electrical Engineering and Intelligentization Dongguan University of Technology Dongguan 523808 China College of Aerospace Engineering Chongqing University Chongqing 400030 China 

出 版 物：《Physical Review Letters》 (Phys Rev Lett)

年 卷 期：2025年第134卷第3期

页      面：033803-033803页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：Ministry of Education - Singapore, MOE, (MOE2019-T2-2-085) Ministry of Education - Singapore, MOE Westlake Education Foundation, (12374364, 103110736022301, 12074443) Science, Technology and Innovation Commission of Shenzhen Municipality, (202308073000209, 20220815111105001, 2024A1515011371, G03034K004, 12304484) Science, Technology and Innovation Commission of Shenzhen Municipality Natural Science Foundation of Guangdong Province General Program, (2021A1515011944) National Natural Science Foundation of China, NSFC, (12104211, 62375118, 62361166627) National Natural Science Foundation of China, NSFC Basic and Applied Basic Research Foundation of Guangdong Province, (2024A1515012770) Basic and Applied Basic Research Foundation of Guangdong Province Westlake University, (210000006022312) Westlake University National Research Foundation Singapore Competitive Research Program, (NRF-CRP23-2019-0007) 

主　　题：Mirrors 

摘      要：We report the experimental realization of a new type of topology-controlled photonic cavities in valley photonic crystals by adopting judiciously oriented mirrors to localize the valley-polarized edge states along their propagation path. By using microwave frequency- and time-domain measurements, we directly observe the strong confinement of electromagnetic energy at the mirror surface due to the extended time delay required for the valley index flipping. Moreover, we experimentally demonstrate that both the degree of energy localization and quality factors of the topology-controlled photonic cavities are determined by the valley-flipping time which is controlled by the topology of the mirror. These results extend and complement the current design paradigm of topological photonic cavities.