Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, ACT 2601, Australia.
The Metamaterials Laboratory, ITMO University, St. Petersburg, 197101, Russia.
Small. 2017 Mar;13(11). doi: 10.1002/smll.201603190. Epub 2017 Jan 12.
Recently introduced field of topological photonics aims to explore the concepts of topological insulators for novel phenomena in optics. Here polymeric chains of subwavelength silicon nanodisks are studied and it is demonstrated that these chains can support two types of topological edge modes based on magnetic and electric Mie resonances, and their topological properties are fully dictated by the spatial arrangement of the nanoparticles in the chain. It is observed experimentally and described how theoretically topological phase transitions at the nanoscale define a change from trivial to nontrivial topological states when the edge mode is excited.
最近引入的拓扑光子学领域旨在探索拓扑绝缘体的概念，以在光学中发现新现象。在这里，研究了亚波长硅纳米盘的聚合物链，并证明这些链可以支持两种基于磁和电 Mie 共振的拓扑边缘模式，并且它们的拓扑性质完全由链中纳米粒子的空间排列决定。实验观察到并理论上描述了当边缘模式被激发时，纳米尺度的拓扑相变如何定义从平凡到非平凡拓扑状态的变化。
