通过高动量-空间缠绕的宽带拓扑慢光
Broadband topological slow light through higher momentum-space winding
摘要：
慢光波导可以强烈增强光-物质相互作用，但存在带宽窄、后向散射增加和安德森局域化的问题。光子拓扑绝缘体中的边缘态抵抗反向散射和局部化，但通常跨越单个布里渊区上的带隙，这意味着慢的群速度意味着窄带操作。在这里，我们从理论上表明，这可以通过边缘终止来规避，该边缘终止导致边缘状态围绕布里渊区缠绕多次，使其既慢又宽。
英文摘要：
Slow-light waveguides can strongly enhance light-matter interaction, but suffer from narrow bandwidth, increased backscattering, and Anderson localization. Edge states in photonic topological insulators resist backscattering and localization, but typically cross the bandgap over a single Brillouin zone, meaning that slow group velocity implies narrow-band operation. Here we show theoretically that this can be circumvented via an edge termination that causes the edge state to wind many times around the Brillouin zone, making it both slow and broadband.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
