摘要详情

ID / 提交时间

93 / 2024-08-29 09:49:23

标题

Large-area Photonic Topological Waveguides with Wide Operating Bandwidths

关键字

large-area waveguides, topological insulator, wide-width

主题及专题

lSensors and Actuators

状态

全文录用

作者

TongShiqi / Southeast University

DaiWenxing / Southeast University

XiaDawei / Southeast University

XuJiawen / Southeast University

摘要

Topological states constructed using photonic topological insulators have garnered significant attention due to their exceptional wave modulation properties. Generally, topological edge states typically form at the interface between two domains of trivial and nontrivial photonic crystals (PhCs), which limits the capacity of transmissions and the interfacing with existing bulk devices in applications. Current studies have achieved large-area topological waveguide states through gapless PhCs insertion between trivial and nontrivial PhCs. However, as the width of the waveguide increases, the operating band tends to be significantly narrowed. In this research, we propose heterostructures with intermittently coupled topological waveguides that are capable of realizing wide-width large-area waveguides while maintaining robustness against structural defects. Simulation results verify that the device is capable of flexible and adjustable wave transmission. The device can realize large-area photonic waveguides with operating bandwidths of approximately 4 GHz. This structure holds the potential for the design of wide-width multifunctional, strongly robust, and highly flexible topological devices.