A 2D valley-Hall photonic topological insulator (PTI) based on the sphere-thorn shaped metamaterial structure is proposed in the red band. The structure unit of the PTI is a composite structure that is composed of metal and dielectric. Simulation shows that there is a topologically protected edge wave (TPEW) at the interface between two such PTIs. The robust transmission of the TPEW is demonstrated in the red band using the waveguide composed of these two PTIs. This valley-Hall PTI provides a method for efficient and free manipulation of visible light, and can be applied to optical communication, integrated photonic devices, and other fields.

中文翻译：

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可见光波段的超材料拓扑绝缘子

在红色波段中，提出了一种基于球刺形超材料结构的二维山谷霍尔光子拓扑绝缘体（PTI）。PTI的结构单元是由金属和电介质组成的复合结构。仿真表明，在两个这样的PTI之间的接口处存在拓扑保护的边波（TPEW）。使用由这两个PTI组成的波导在红色波段中演示了TPEW的鲁棒传输。这个山谷霍尔PTI提供了一种有效且自由地操纵可见光的方法，并且可以应用于光通信，集成光子器件和其他领域。