22 February 2024 | Lei Huang, Lu He, Weixuan Zhang, Huizhen Zhang, Dongning Liu, Xue Feng, Fang Liu, Kaiyu Cui, Yidong Huang, Wei Zhang & Xiangdong Zhang
This paper reports the experimental realization of hyperbolic photonic topological insulators using coupled ring resonators on silicon chips. The authors designed and fabricated face-centered and vertex-centered hyperbolic topological insulators with non-trivial real-space Chern numbers. They observed boundary-dominated one-way edge states with pseudospin-dependent propagation directions and verified the robustness of these edge states in the presence of defects. The findings have potential applications in designing high-efficient topological photonic devices with enhanced boundary responses. The theoretical framework and experimental setup are detailed, and the results are supported by simulations and measurements. The work advances the understanding and practical implementation of topological states in non-Euclidean spaces, opening new avenues for the development of advanced photonic devices.This paper reports the experimental realization of hyperbolic photonic topological insulators using coupled ring resonators on silicon chips. The authors designed and fabricated face-centered and vertex-centered hyperbolic topological insulators with non-trivial real-space Chern numbers. They observed boundary-dominated one-way edge states with pseudospin-dependent propagation directions and verified the robustness of these edge states in the presence of defects. The findings have potential applications in designing high-efficient topological photonic devices with enhanced boundary responses. The theoretical framework and experimental setup are detailed, and the results are supported by simulations and measurements. The work advances the understanding and practical implementation of topological states in non-Euclidean spaces, opening new avenues for the development of advanced photonic devices.