论文标题
通过边缘状态之间的激子 - 果龙角模式之间的耦合
Coupling between Exciton-Polariton Corner Modes through Edge States
论文作者
论文摘要
最近实现的高阶拓扑绝缘子在理论和实验性凝结物质社区中引起了人们的兴趣。二维二阶拓扑绝缘子可产生零维的局部角度模式，该模式驻留在系统的带隙内，以及居住在散装模式旁边的带边缘的边缘模式。由于拓扑性质，信息可能会被困在这些系统的角落，即使在存在混乱的情况下，这些系统也会受到损害。在拐角处，拐角处之间的信息交换是一个问题。在这里，我们表明，基于光学参数散射，激子极化系统中的非线性可以通过边缘状态之间的耦合，从而实现了多种可连接拓扑模式的系统。
Recently realized higher order topological insulators have taken a surge of interest among the theoretical and experimental condensed matter community. The two-dimensional second order topological insulators give rise to zero-dimensional localized corner modes that reside within the band gap of the system along with edge modes that inhabit a band edge next to bulk modes. Thanks to the topological nature, information can be trapped at the corners of these systems, which will be unhampered even in the presence of disorder. Being localized at the corners, the exchange of information among the corner states is an issue. Here we show that the nonlinearity in an exciton polariton system can allow the coupling between the different corners through the edge states based on optical parametric scattering, realizing a system of multiple connectible topological modes.
