论文标题
非线性引起的光子拓扑绝缘子
Nonlinearity-induced photonic topological insulator
论文作者
论文摘要
拓扑绝缘子的标志性特征使边缘运输几乎不渗透到缺陷和晶格障碍处的散射。在我们的工作中，我们使用光子平台在实验上证明了拓扑系统，在该平台中，拓扑阶段的存在是由非线性引起的。尽管在线性方向上，晶格结构在拓扑上保持微不足道，而在一定功率阈值上方发射的光束将系统驱动到其瞬态拓扑状态，从而定义了沿其边缘的非线性单向通道。我们的工作研究物质在非线性制度中的拓扑特性，并可能为以按需方式构成拓扑特征的紧凑型设备铺平道路。
The hallmark feature of topological insulators renders edge transport virtually impervious to scattering at defects and lattice disorder. In our work, we experimentally demonstrate a topological system, using a photonic platform, in which the very existence of the topological phase is brought about by nonlinearity. Whereas in the linear regime, the lattice structure remains topologically trivial, light beams launched above a certain power threshold drive the system into its transient topological regime, and thereby define a nonlinear unidirectional channel along its edge. Our work studies topological properties of matter in the nonlinear regime, and may pave the way towards compact devices that harness topological features in an on-demand fashion.
