Spin Hall Effect of Light with Near‐Unity Efficiency in the Microwave,Laser & Photonics Reviews

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Spin Hall Effect of Light with Near‐Unity Efficiency in the Microwave
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2020-12-06 , DOI: 10.1002/lpor.202000393
Minkyung Kim ₁ , Dasol Lee ₁ , Hyukjoon Cho ₂ , Bumki Min ₂ , Junsuk Rho _{1,

3}

Affiliation

The spin Hall effect of light (SHEL) refers to a transverse and spin‐dependent shift of light in real space at an optical interface. Previous studies of enhancing the SHEL have involved extremely low efficiency, and achieving a large SHEL and high efficiency simultaneously has never been reported. Here, an approach using anisotropic impedance mismatching to attain a large SHEL with near‐unity efficiency in the microwave spectrum is proposed. A wire medium that has a near‐unity transmission for one polarization and low transmission for the other is used to achieve high efficiency. The spin‐dependent splitting is experimentally confirmed by measuring transmission coefficients and the spatial profile of Stokes parameters. The large SHEL with near‐unity efficiency will enable highly efficient devices with spin‐selective functionalities.

中文翻译：

微波具有接近单位效率的自旋霍尔效应

光的自旋霍尔效应（SHEL）是指光在光学界面处在实际空间中的横向和自旋相关的移位。先前关于增强SHEL的研究涉及极低的效率，从未报道过同时实现大型SHEL和高效率。在此，提出了一种利用各向异性阻抗失配在微波频谱中获得具有接近统一效率的大SHEL的方法。为了实现高效率，使用一种介质具有一个偏振态的近统一透射率而另一种偏振态的透射率低。通过测量透射系数和斯托克斯参数的空间分布，实验确定了自旋相关的分裂。具有接近统一效率的大型SHEL将使具有自旋选择功能的高效设备成为可能。

更新日期：2021-02-11

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