论文标题
单向无反射的激子 - 果态旋转过滤通道
One-way reflection-free exciton-polariton spin filtering channel
论文作者
论文摘要
我们认为在一条带有锯齿形边缘的蜂窝状晶格中的理论上是激子 - 果仁糖，这表明旋转轨道耦合，Zeeman分裂的相互作用，sublattices之间的现场失调可以在能量分裂的所有边缘状态分裂的频带结构中引起。在能量间隔内，一个自旋极化边缘状态之一驻留在无间隙的体积中，旋转相反。被相反的自旋包围，不存在向后传播的边缘状态可确保无反射和反馈抑制了系统中一种特定自旋的极性孔的单向流动。该系统中的边缘状态比标准拓扑极化系统中的边缘更本地化，并且完全自旋偏振。这为无反馈的无自旋选择性极化通道铺平了道路，以转移北极星网络中的信息。
We consider theoretically exciton-polaritons in a strip of honeycomb lattice with zigzag edges and it is shown that the interplay among the spin-orbit coupling, Zeeman splitting, and an onsite detuning between sublattices can give rise to a band structure where all the edge states of the system split in energy. Within an energy interval, one of the spin polarized edge states resides with the gap-less bulk having opposite spin. Being surrounded by opposite spin and the absence of the backward propagating edge state ensures both reflection free and feedback suppressed one-way flow of polaritons with one particular spin in the system. The edge states in this system are more localized than those in the standard topological polariton systems and are fully spin polarized. This paves the way for feedback free spin-selective polariton channels for transferring information in polariton networks.
