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  • Open Access

Spin-dependent routing of optical beams in the bulk of twisted anisotropic media

Chandroth P. Jisha1,*, Lorenzo Marrucci2, Stefan Nolte1,3, and Alessandro Alberucci1,†

  • *Contact author: jisha.chandroth.pannian@uni-jena.de
  • †Contact author: alessandro.alberucci@uni-jena.de
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Phys. Rev. A 112, 043521 – Published 15 October, 2025

DOI: https://doi.org/10.1103/jm7q-nxy1

Abstract

We theoretically discuss a kind of photonic spin-Hall effect (PSHE) for optical beams propagating inside an inhomogeneously twisted anisotropic material. The rotation angle plays the role of an effective gauge field. When the twisting distribution is odd symmetric, the optical beams move along mirror-symmetric trajectories according to their helicity. Connection of this volumetric PSHE with the geometric phase and the Kapitza effect is elucidated.

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Phys. Rev. A 112, 043521– Published 15 October, 2025
  • Received 7 July 2025
  • Accepted 24 September 2025
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