拓扑光子态是具有单向传输特性的新型波导态,展示出抗背向散射、障碍物及缺陷免疫等独特而神奇的物理性质。拓扑光子态因其独特性在拓扑激光器、量子信息、混合集成光路、非线性光学等领域具有广泛的潜在应用。磁光光子晶体为实现拓扑光子态、探索拓扑光子态新物性提供了重要平台。本文聚焦磁光光子晶体中拓扑光子态的研究进展,首先回顾有序、无序晶格中的拓扑光子态,揭示拓扑光子态的微观物理图像。接着讨论时间和空间反演对称性双破缺体系中的拓扑光子态,简述反手性拓扑光子态的产生。然后介绍宽带拓扑光子态及拓扑慢光态研究,展示新颖的拓扑光学现象及器件设计。最后针对磁光光子晶体中拓扑光子态研究面临的关键问题、未来发展趋势进行分析和展望。

Topological photonic state, as a new type of waveguide state with one-way transport, can resist backscattering and is immune to obstacles and defects. Thus, it has found extensive potential applications in topological lasers, quantum information, optical hybrid integrated circuits, nonlinear optics, and other fields owing to its unique properties. In addition, magneto-optical photonic crystal provides an important platform for realizing topological photonic states and exploring their novel physical properties. In this paper, around the progress of topological photonic states in magneto-optic photonic crystals, firstly, we reviewed the topological photonic states in ordered and disordered lattices and revealed the microscopic physical images of topological photonic states. Next, we discussed the topological photonic states in magneto-optical photonic crystals with broken time-reversal and space-reversal symmetries and described the generation of antichiral topological photonic states. Then, we summarized the research on broadband topological photonic states and topological slow-light states and introduced novel topological optical phenomena and device design. Finally, we analyzed the key issues and prospected the future development trends in the study of topological photonic states in magneto-optical photonic crystals.