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

• Tác giả: Yuan Cao, Jingming Chen, Xiao-Dong Chen, Zhen Gao, Baoliang Liao, Gui-Geng Liu, Yan Meng, Fulong Shi, Xiang Xi, Kexin Xiang, Bei Yan, Linyun Yang, Baile Zhang, Zhenxiao Zhu
• Ngôn ngữ: eng
• Ký hiệu phân loại: 156.2 Comparative psychology of sensory perception, movement, emotions,
• Thông tin xuất bản: United States : Physical review letters , 2025
• Bộ sưu tập: NCBI
• ID: 4948

Tóm tắt

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.