Geometric spin Hall effect of light with inhomogeneous polarization
Geometric spin Hall effect of light with inhomogeneous polarization
复制标题
DOI：
10.1016/j.optcom.2016.09.043
复制
发表时间：
2017-01
影响因子：
2.4
通讯作者：
Xiaohui Ling;Xinxing Zhou;Xunong Yi
中科院分区：
文献类型：
--
作者：
Xiaohui Ling;Xinxing Zhou;Xunong Yi
光的自旋霍尔效应起源于光的自旋-轨道相互作用，表现为两种几何相位。本文报道了通过产生非均匀偏振分布的光束观察到的几何自旋霍尔效应。不同于先前报道的几何自旋霍尔效应中观察到的一个倾斜的光束检测器系统，这被认为是从一个有效的自旋重定向Berry几何相位，这里演示的几何自旋霍尔效应是由于一个有效的，空间变化的Pancharatnam-Berry几何相位产生的非均匀极化几何。我们进一步的实验表明，几何自旋霍尔效应可以通过调整光的偏振几何来调节，证明光子的自旋状态可以以很大的灵活性来操纵。
The spin Hall effect of light originates from spin-orbit interaction of light, which manifests two types of geometric phases. In this paper, we report the observation of a geometric spin Hall effect by generating a light beam with inhomogeneous polarization distribution. Unlike the previously reported geometric spin Hall effect observed in a tilted beam-detector system, which is believed to result from an effective spin-redirection Berry geometric phase, the geometric spin Hall effect demonstrated here is attributed to an effective, spatially varying Pancharatnam-Berry geometric phase generated by the inhomogeneous polarization geometry. Our further experiments show that the geometric spin Hall effect can be tuned by tailoring the polarization geometry of light, demonstrating the spin states of photons can be steered with a great flexibility.