An optical rotation bio-sensor based on the photonic spin Hall effect was established and applied to detecting the concentration varieties of chiral molecules. The optical rotation, introduced by sample solutions, was exploited to modulate the postselected polarization of a weak measurement system. Much work has been done in the case of glucose and fructose. However, little attention has been paid for biomolecules, such as proteins and amino acids. With this modulation, the optical rotation can be determined through the direction and spin accumulation of light spots, thus mirroring the concentration of solutions. A resolution of 2×10–4 degree was achieved.

光子自旋霍尔效应是一种潜在的精密测量工具，在探测微结构材料结构参数变化的研究中具有重要的物理意义。基于光子自旋霍尔效应的弱测量模型研究了纳米金属薄膜中的光子自旋霍尔效应，研究结果表明当弱测量中放大角取相应的特殊值时（即最佳弱测量点），纳米金属薄膜中光子自旋霍尔效应的放大后横移值可达到最大，大大提高了光子自旋霍尔效应的探测精度；在最佳弱测量点得到的放大后横移可以更精确地推断出金属薄膜的实际厚度。实验结果与理论分析符合较好，该方法为研制基于光子自旋霍尔效应的精密测量工具提供了理论与实验基础。

从理论上和实验上研究了转换反射中光自旋霍尔效应的自旋堆积方向的方法，建立了描述光束在空气棱镜界面反射的自旋堆积模型，揭示了横移与光束入射偏振角的定性关系。研究发现，当入射角小于布儒斯特角时，随着入射偏振角的逐渐增大，自旋堆积的方向发生反转。而当入射角大于布儒斯特角时，自旋堆积的方向不再随入射偏振角的变化而反转。结果表明，在光束入射角为确定值且小于布儒斯特角的情况下，可以通过调控光束的入射偏振角转换自旋堆积的方向。转换自旋堆积方向的研究为有效调控光自旋霍尔效应提供了新的途径。