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Incident-Polarization-Independent Spin Hall Effect of Light Reaching Half Beam Waist SCIE SCOPUS

Title
Incident-Polarization-Independent Spin Hall Effect of Light Reaching Half Beam Waist
Authors
Kim, MinkyungLee, DasolRho, Junsuk
Date Issued
2022-06
Publisher
John Wiley and Sons Inc
Abstract
© 2022 Wiley-VCH GmbHThe spin Hall effect of light (SHEL), a spin-dependent transverse splitting of light at an optical interface, is intrinsically an incident-polarization-sensitive phenomenon. Recently, an approach to eliminate the polarization dependence by equalizing the reflection coefficients of two linear polarizations has been proposed, but is only valid when the beam waist is sufficiently larger than the wavelength. Here, it is demonstrated that an interface, at which the reflection coefficients of the two linear polarizations are the same and so are their derivatives with respect to the incident angle, supports the polarization-independent spin Hall shift, even when the beam waist is comparable to the wavelength. In addition, an isotropic–anisotropic interface that exhibits the polarization-independent spin Hall shift over the entire range of incident angles is presented. Monte-Carlo simulations prove that spin Hall shifts are degenerate under any polarization and reach a half of beam waist under unpolarized incidence. An application of the beam-waist-scale SHEL as a tunable beam-splitting device that is responsive to the incident polarization is suggested. The spin Hall shift that is independent of the incident polarization at any incident angle will facilitate a wide range of applications including practical spin-dependent devices and active beam splitters.
URI
https://oasis.postech.ac.kr/handle/2014.oak/112926
DOI
10.1002/lpor.202100510
ISSN
1863-8880
Article Type
Article
Citation
Laser and Photonics Reviews, vol. 16, no. 6, 2022-06
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노준석RHO, JUNSUK
Dept of Mechanical Enginrg
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