论文标题
高阶光子拓扑绝缘子的逆设计
Inverse design of higher-order photonic topological insulators
论文作者
论文摘要
拓扑光子学彻底改变了一些传统的光传播和操纵方法，并为开发新型光子设备提供了前所未有的手段。最近发现的高阶拓扑阶段超出了光子晶体的常规散装对应关系，并引入了新的拓扑保护机会。在这里，我们介绍了一种智能数值方法，用于逆设计高阶光子拓扑绝缘子的反向设计，具有控制拓扑边缘和拓扑角状态的灵活性。特别是，我们考虑了二阶光子拓扑制剂，并设计了几个在不同频率下支撑边缘和角状态的结构。通过仔细编程这些结构，我们建议通过更改操作频率来解决边缘和角状态的拓扑路线的新方法。我们的发现为整合拓扑光子设备与新功能铺平了道路。
Topological photonics revolutionizes some of the traditional approaches to light propagation and manipulation, and it provides unprecedented means for developing novel photonic devices. Recently discovered higher-order topological phases go beyond the conventional bulk-edge correspondence for photonic crystals and introduce novel opportunities for topological protection. Here, we introduce an intelligent numerical approach for inverse design of higher-order photonic topological insulators with great flexibility for controlling both topological edge and topological corner states. In particular, we consider the second-order photonic topological insulator and design several structures supporting both edge and corner states at different frequencies. By carefully programming these structures, we suggest a novel approach for topological routing of the edge and corner states by changing the operational frequency. Our finding paves the way to integrated topological photonic devices with novel functionalities.
