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

作     者：Yan, Bei Liao, Baoliang Shi, Fulong Xi, Xiang Cao, Yuan Xiang, Kexin Meng, Yan Yang, Linyun Zhu, Zhenxiao Chen, Jingming Chen, Xiao-Dong Liu, Gui-Geng Zhang, Baile Gao, Zhen 

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 Shenzhen518055 China Hubei Province Key Laboratory of Systems Science in Metallurgical Process College of Science Wuhan University of Science and Technology Wuhan430081 China Guangdong Province Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics Technology Jinan University Guangzhou510632 China School of Physics State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-Sen University Guangzhou510275 China School of Electrical Engineering and Intelligentization Dongguan University of Technology Dongguan523808 China College of Aerospace Engineering Chongqing University Chongqing400030 China Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link Singapore637371 Singapore 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2024年

核心收录：

主　　题：Mirrors 

摘      要：We report an 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. © 2024, CC BY.