题目：拓扑波导

报告人：陈子亭(Che Ting Chan)

时间：2025年10月17日（周五）14:00

地点：紫金港校区海纳苑4幢201报告厅

摘要：

拓扑保护边界态可实现单向波传播，为抵御结构缺陷或无序性引起的背向散射的光子/声子器件提供了新途径。然而，此类系统中的波传播受限于拓扑相异区域的边界。由于能量/信号传输的边界态通道两侧必须存在由拓扑不变量定义带隙的拓扑绝缘体材料，导致其有效传输面积远小于器件的整体面积。因此，实现鲁棒性单向传输需以空间利用率为代价，体材料区域仅充当包层结构。为突破此局限，我们尝试通过构建拓扑波导达到100%的空间利用率。此外，我们将展示一些特殊的波导网络表现出一些非常独特的波传播特性，这些特性与拓扑光子晶体相似，使它们在探索拓扑物理方面具有实用价值。

个人简介：

C.T. Chan received his BSc degree from the University of Hong Kong in 1980 and his PhD degree from the University of California at Berkeley in 1985.  He is the Daniel C K Yu Professor of Science, Chair Professor of Physics, and the Interim Director of HKUST Jockey Club Institute for Advanced Study. He has been elected a Fellow of the American Physical Society and the Physical Society of Hong Kong and a member of the Hong Kong Academy of Sciences.