The enhancement of the optical spin Hall effect (OSHE) of a transmitted beam has been achieved in a small incident angle of a sub-degree scale. The OSHE at a large incident angle can be beneficial in optical applications, such as polarization-dependent sensors and filters, but studies to increase the OSHE at a large incident angle have been elusive in transmission mode. We propose a dielectric grating on a metal layer to achieve the grating-induced increase of the OSHE. The polarization-dependent transmission and OSHE that reaches several wavelengths are numerically demonstrated. We also show the tunability of the operating wavelength and incident angle of the OSHE by changing materials and geometrical parameters.

中文翻译：

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介质光栅中衍射引起的光学自旋霍尔效应的增强

在亚度尺度的小入射角下已经实现了透射光束的光学自旋霍尔效应（OSHE）的增强。大入射角的OSHE在光学应用中可能是有益的，例如偏振相关的传感器和滤光片，但是在透射模式下，增加大入射角的OSHE的研究还很困难。我们提出在金属层上的介电光栅，以实现OSHE的光栅引起的增加。数值显示了偏振相关的透射率和到达多个波长的OSHE。我们还通过更改材料和几何参数显示了OSHE的工作波长和入射角的可调性。