论文标题
大山谷的拓扑光子晶体
Topological Photonic Crystal of Large Valley Chern Numbers
论文作者
论文摘要
最近对光子晶体拓扑谷相的实现，即电子系统中散布的valleytronic材料的类似物，仅限于Chern Chern数量的一个。在这封信中，我们提出了一种新型的山谷阶段，该阶段可以有两个或三个山谷的大山谷。通过更改单位单元格的配置，可以实现不同山谷Chern号码（从一到三）之间的山谷相变。我们证明，这些新的拓扑阶段可以沿着锋利弯曲的域壁坚固地指导波传播。我们的结果是在光子系统中探索新的拓扑现象的希望。
The recent realizations of topological valley phase in photonic crystal, an analog of gapped valleytronic materials in electronic system, are limited to the valley Chern number of one. In this letter, we present a new type of valley phase that can have large valley Chern number of two or three. The valley phase transitions between the different valley Chern numbers (from one to three) are realized by changing the configuration of the unit cell. We demonstrate that these new topological phases can guide the wave propagation robustly along the domain wall of sharp bent. Our results are promising for the exploration of new topological phenomena in photonic systems.
