Propagative Oscillations in Codirectional Polariton Waveguide Couplers
Propagative Oscillations in Codirectional Polariton Waveguide Couplers
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DOI：
10.1103/physrevlett.126.075302
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发表时间：
2021-02-16
影响因子：
8.6
通讯作者：
Klembt, S.
中科院分区：
文献类型：
--
作者：
Beierlein, J.;Rozas, E.;Klembt, S.
我们报道了一种新的激子-极化子路由装置，用于研究和有目的地引导光物质粒子的凝聚相。在共向耦合装置中，两个波导通过部分蚀刻的部分连接，该部分有利于相邻通道的可调谐耦合。每个波导中两个宏观波函数的这种倏逝耦合在凝聚态的实际空间振荡中表现出来。到目前为止，这种类约瑟夫森振荡只在耦合极化阱中被观察到。在这里，我们报告了一个类似的耦合行为在一个可控的，传播波导为基础的设计。通过控制间隙宽度、通道长度或传播能量，可以选择极化子流的出口。该同向极化器件是一种无源可扩展耦合器元件，可用于紧凑的下一代逻辑架构。
We report on novel exciton-polariton routing devices created to study and purposely guide light-matter particles in their condensate phase. In a codirectional coupling device, two waveguides are connected by a partially etched section that facilitates tunable coupling of the adjacent channels. This evanescent coupling of the two macroscopic wave functions in each waveguide reveals itself in real space oscillations of the condensate. This Josephson-like oscillation has only been observed in coupled polariton traps so far. Here, we report on a similar coupling behavior in a controllable, propagative waveguide-based design. By controlling the gap width, channel length, or propagation energy, the exit port of the polariton flow can be chosen. This codirectional polariton device is a passive and scalable coupler element that can serve in compact, next generation logic architectures.