Wide-angle giant photonic spin Hall effect

Zhihao Chen, Yu Chen, Yaodong Wu, Xinxing Zhou, Handong Sun, Tony Low, Hongsheng Chen, Xiao Lin

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The photonic spin Hall effect is a manifestation of the spin-orbit interaction of light and can be measured by a transverse shift δ 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., δ/λ<10-1, where λ is the wavelength), which impedes its precise measurement. To date, proposals to generate a giant spin Hall effect (namely, with δ/λ>102) have severe limitations, particularly its occurrence only over a narrow angular cone (with a width of Δθ<1). Here we propose a universal scheme to realize the wide-angle giant photonic spin Hall effect with Δθ>70 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.

Original languageEnglish (US)
Article number075409
JournalPhysical Review B
Volume106
Issue number7
DOIs
StatePublished - Aug 15 2022
Externally publishedYes

Bibliographical note

Funding Information:
X.L. was sponsored in part by the National Natural Science Foundation of China (62175212), the National Natural Science Fund for Excellent Young Scientists Fund Program (Overseas) of China, the Fundamental Research Funds for the Central Universities (2021FZZX001-19), and Zhejiang University Global Partnership Fund. X.Z. was supported by the National Natural Science Foundation of China (11604095). H.S. acknowledges support from the Singapore Ministry of Education AcRF Tier 1 [RG95/19 (S)].

Publisher Copyright:
© 2022 American Physical Society.

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