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Title: Wide-angle giant photonic spin Hall effect
Authors: Chen, Zhihao
Chen, Yu
Wu, Yaodong
Zhou, Xinxing
Sun, Handong
Low, Tony
Chen, Hongsheng
Lin, Xiao
Keywords: Science::Physics
Issue Date: 2022
Source: Chen, Z., Chen, Y., Wu, Y., Zhou, X., Sun, H., Low, T., Chen, H. & Lin, X. (2022). Wide-angle giant photonic spin Hall effect. Physical Review B, 106(7), 075409-1-075409-7.
Project: RG95/19 (S)
Journal: Physical Review B 
Abstract: Photonic spin Hall effect is a manifestation of spin-orbit interaction of light and can be measured by a transverse shift \lambda of photons with opposite spins. The precise measurement of transverse shifts can enable many spin-related applications, such as precise metrology and optical sensing. However, this transverse shift is generally small (i.e. \delta /\lambda <{10}^{-1}, \lambda is the wavelength), which impedes its precise measurement. To-date proposals to generate giant spin Hall effect (namely with \delta /\lambda >{10}^{2}) have severe limitations, particularly its occurrence only over a narrow angular cone (with a width of \Delta \theta <{1}^{\circ}). Here we propose a universal scheme to realize the wide-angle giant photonic spin Hall effect with \Delta \theta >{70}^{\circ} by exploiting the interface between free space and uniaxial epsilon-near-zero media. The underlying mechanism is ascribed to the almost-perfect polarization splitting between s and p polarized waves at the designed interface. Remarkably, this almost-perfect polarization splitting does not resort to the interference effect and is insensitive to the incident angle, which then gives rise to the wide-angle giant photonic spin Hall effect.
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.106.075409
Schools: School of Physical and Mathematical Sciences 
Research Centres: Centre for Disruptive Photonic Technologies (CDPT) 
Rights: ©2022 American Physical Society. All rights reserved. This paper was published in Physical Review B and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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