Total Reflection-Induced Efficiency Enhancement of the Spin Hall Effect of Light
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- Title
- Total Reflection-Induced Efficiency Enhancement of the Spin Hall Effect of Light
- Authors
- Kim, Minkyung; Lee, Dasol; Thi Hai-Yen Nguyen; Lee, Hee-Jo; Byun, Gangil; Rho, Junsuk
- Date Issued
- 2021-09
- Publisher
- AMER CHEMICAL SOC
- Abstract
- The spin Hall effect of light (SHEL) refers to the spin-dependent and transverse splitting of oblique incidence that occurs in both refraction and reflection. Enhancement of the SHEL is generally accompanied by a degradation in the efficiency. Recently, an anisotropic metamaterial has been proposed to attain a large SHEL with near-unity efficiency, but is limited to a horizontally polarized incidence. Here, a new approach to achieve a large SHEL and high efficiency simultaneously for arbitrarily polarized incidence is proposed by exploiting total external and internal reflection. The total reflection at the interface of a dense-to-sparse medium yields a theoretical maximum of the shift that is allowed for a unity efficiency. The SHEL can be further enhanced by increasing the refractive index contrast. Furthermore, we suggest a three-dimensional isotropic metamaterial that is designed to have an index below unity as a platform to experimentally demonstrate the SHEL with high efficiency. Our work will find wide applications in spin-dependent photonic devices.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/112931
- DOI
- 10.1021/acsphotonics.1c00727
- ISSN
- 2330-4022
- Article Type
- Article
- Citation
- ACS PHOTONICS, vol. 8, no. 9, page. 2705 - 2712, 2021-09
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