Abstract The spin Hall effect of light (SHEL) is a photonic version of the spin Hall effect in electronic systems, and it has been a focused research area in the recent ten years. However, due to the lack of effective methods dynamic modulation of spin-dependent splitting, the practical application of SHEL has remained a challenge, still urgently waiting to be resolved. In recent years, SHEL has been applied to the precise measurement and sensing of various physical quantities. Now, how to make SHEL measurement flexible is the research direction of researchers The magneto-optical spin Hall effect of light (MOSHEL) is a useful attempt to implement a dynamic transformation of SHEL. The spin–orbit coupling or non-reciprocal phase shift caused by magnetic fields in different directions applied to magneto-optical materials can be flexibly and timely controlled. This paper reports our studies on the magneto-optical effect in multilayer structure. For the first time, the refractive index of very low concentration sample solution is sensed through the method of weak measurement under the condition of transverse magneto-optical Kerr effect. The ultra-high sensitivity of 2.9 × 104 μ m/RIU was measured under the optimum parameters. This is of great significance in advancing the practical application of MOSHEL.

中文翻译：

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光的磁光自旋霍尔效应及其在折射率检测中的应用

摘要 光的自旋霍尔效应（SHEL）是电子系统中自旋霍尔效应的光子版本，是近十年来的研究热点。然而，由于缺乏有效的自旋相关分裂动态调制方法，SHEL的实际应用仍然是一个挑战，仍亟待解决。近年来，SHEL已应用于各种物理量的精密测量和传感。现在，如何使SHEL测量灵活是研究人员的研究方向。光的磁光自旋霍尔效应（MOSHEL）是实现SHEL动态变换的有益尝试。可以灵活及时地控制由施加在磁光材料上的不同方向的磁场引起的自旋轨道耦合或非互易相移。本文报告了我们对多层结构中磁光效应的研究。首次在横向磁光克尔效应条件下，通过弱测量法检测极低浓度样品溶液的折射率。在最佳参数下测得的超高灵敏度为 2.9 × 104 μ m/RIU。这对于推进MOSHEL的实际应用具有重要意义。在横向磁光克尔效应条件下，通过弱测量的方法感测极低浓度样品溶液的折射率。在最佳参数下测得的超高灵敏度为 2.9 × 104 μ m/RIU。这对于推进MOSHEL的实际应用具有重要意义。在横向磁光克尔效应条件下，通过弱测量的方法感测极低浓度样品溶液的折射率。在最佳参数下测得的超高灵敏度为 2.9 × 104 μ m/RIU。这对于推进MOSHEL的实际应用具有重要意义。