Optical spin Hall effect
Optical spin Hall effect
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DOI：
10.1103/physrevlett.95.136601
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发表时间：
2005-09-23
影响因子：
8.6
通讯作者：
Glazov, M
中科院分区：
文献类型：
--
作者：
Kavokin, A;Malpuech, G;Glazov, M
在众所周知的自旋霍尔效应和微腔中光的瑞利散射的偏振依赖性之间建立了一个显著的类比。这种依赖性来自激子极化子弹性散射中的强自旋效应：如果初始极化子态自旋为零并且具有一定的线性极化，则散射的极化子变成强自旋极化。散射态的极化可以是正的，也可以是负的，这取决于初始态线极化的方向和散射的方向。非常令人惊讶的是，顺时针和逆时针散射的极化子的自旋极化有不同的符号。光自旋霍尔效应的产生是由于微腔中激子极化子的强纵-横分裂和有限寿命。
A remarkable analogy is established between the well-known spin Hall effect and the polarization dependence of Rayleigh scattering of light in microcavities. This dependence results from the strong spin effect in elastic scattering of exciton polaritons: if the initial polariton state has a zero spin and is characterized by some linear polarization, the scattered polaritons become strongly spin polarized. The polarization in the scattered state can be positive or negative dependent on the orientation of the linear polarization of the initial state and on the direction of scattering. Very surprisingly, spin polarizations of the polaritons scattered clockwise and anticlockwise have different signs. The optical spin Hall effect is possible due to strong longitudinal-transverse splitting and finite lifetime of exciton polaritons in microcavities.