Optical vectorial-mode parity Hall effect: a case study with cylindrical vector beams

Changyu Zhou, Weili Liang, Zhenwei Xie (), Jia Ma, Hui Yang, Xing Yang, Yueqiang Hu, Huigao Duan () and Xiaocong Yuan ()
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Changyu Zhou: Shenzhen University
Weili Liang: Shenzhen University
Zhenwei Xie: Shenzhen University
Jia Ma: Shenzhen University
Hui Yang: Hunan University
Xing Yang: Hunan University
Yueqiang Hu: Hunan University
Huigao Duan: Hunan University
Xiaocong Yuan: Shenzhen University

Nature Communications, 2024, vol. 15, issue 1, 1-7

Abstract: Abstract The vectorial optical field (VOF) assumes a pivotal role in light-matter interactions. Beyond its inherent polarization topology, the VOF also encompasses an intrinsic degree of freedom associated with parity (even or odd), corresponding to a pair of degenerate orthogonal modes. However, previous research has not delved into the simultaneous manipulation of both even and odd parities. In this study, we introduce and validate the previously unexplored parity Hall effect for vectorial modes using a metasurface design. Our focus lies on a cylindrical vector beam (CVB) as a representative case. Through the tailored metasurface, we effectively separate two degenerate CVBs with distinct parities in divergent directions, akin to the observed spin states split in the spin Hall effect. Additionally, we provide experimental evidence showcasing the capabilities of this effect in multi-order CVB demultiplexing and parity-demultiplexed CVB-encoded holography. This effect unveils promising opportunities for various applications, including optical communication and imaging.

Date: 2024
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DOI: 10.1038/s41467-024-48187-3

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