蜂窝晶格中极化激元边缘态的自旋动量锁定
Spin-momentum locking of polariton edge states in honeycomb lattices
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中文总结 AI 辅助
研究通过介质镜微腔中横电/横磁分裂引入的有效自旋轨道耦合，利用斯托克斯偏振法揭示蜂窝激子极化晶格中锯齿形边缘态的自旋动量锁定，为无外磁场的超快自旋控制单向传播提供途径。
中文摘要 AI 辅助
介电镜微腔中的横向电/横向磁分裂为光子引入了有效的自旋轨道耦合。虽然体态保持线性极化，但对于光子晶格中指数局域化的边缘态，这种耦合会诱导椭圆极化，其旋向与传播方向锁定，类似于倏逝电磁波的横向自旋。我们通过蜂窝激子极化晶格中锯齿形边缘态的斯托克斯偏振法揭示了自旋动量锁定。这种效应在支持光子带隙的拉伸蜂窝中持续存在，其中自旋极化载流子注入能够实现手性边缘态的选择性激射。我们的结果为在没有外部磁场的极化子系统中实现超快自旋控制的单向传播提供了一条途径。
英文摘要
Transverse-electric/Transverse-magnetic splitting in dielectric-mirror microcavities introduces an effective spin-orbit coupling for photons. While the bulk states remain linearly polarized, for exponentially localized edge states in a photonic lattice, this coupling induces elliptical polarization whose handedness is locked to the propagation direction, analogous to the transverse spin of evanescent electromagnetic waves. We reveal spin-momentum locking through Stokes polarimetry of zigzag edge states in a honeycomb exciton-polariton lattice. The effect persists in a stretched honeycomb supporting a photonic bandgap, where spin-polarized carrier injection enables selective lasing of either chiral edge states. Our results provide a route toward ultrafast spin-controlled unidirectional propagation in polariton systems without external magnetic fields.
