利用动力学相位和几何相位操控光自旋霍尔效应中的自旋分裂

发布时间：2018-04-26 23:23

本文选题：物理光学 + 自旋霍尔效应　；参考：《光学学报》2017年02期

【摘要】：从理论和实验角度,系统研究了基于动力学相位和几何相位来实现对光自旋霍尔效应中的自旋分裂的操控,利用推广的费马原理,理论上分析了这两类相位对光束传输行为的影响。结果表明,几何相位可以操控光束的自旋分裂,分裂的大小与超表面的空间旋转率有关,分裂的方向与几何相位的梯度方向一致。动力学相位能操控光束的整体平移,平移大小与动力学相位梯度相关,平移方向与动力学相位梯度的方向一致。基于空间光调制器和超表面搭建了一套实验系统,该系统证明了基于动力学相位和几何相位操控光自旋霍尔效应中自旋分裂方法的可行性。
[Abstract]:Theoretically and experimentally, the manipulation of spin splitting in the optical spin Hall effect based on the dynamic phase and the geometric phase is systematically studied, and the generalized Fermat principle is used. The effects of these two phases on the beam propagation behavior are analyzed theoretically. The results show that the geometric phase can control the spin splitting of the beam. The size of the splitting is related to the spatial rotation rate of the supersurface and the direction of the splitting is consistent with the gradient direction of the geometric phase. The dynamic phase can control the overall translation of the beam. The magnitude of the translation is related to the dynamic phase gradient, and the direction of the translation is consistent with the direction of the dynamic phase gradient. An experimental system based on spatial light modulator and supersurface is constructed. The system proves the feasibility of the spin splitting method based on dynamic phase and geometric phase to manipulate the spin Hall effect.
【作者单位】：湖南理工学院信息与通信工程学院;
【基金】：国家自然科学基金(61205126) 湖南省科技计划项目(2016TP1021) 湖南省教育厅青年项目(2017)
【分类号】：O436.3

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