Spin-polarization-dependent tunable orbital angular momentum Hall effect in spatially tailored symmetry-broken non-vortex structures

Abstract We demonstrate a spin (circular polarization)-dependent tunable orbital angular momentum (OAM) Hall effect of light in a uniquely engineered symmetry-broken, non-vortex structure realized through pixel modulation of a spatial light modulator. The interplay between dynamical phase and multiple forms of geometric phase within this structure gives rise to the spin-dependent generation of spatially separated vortex beams from an initially non-vortex input. The distinctive features of this spin-dependent tunable OAM Hall effect are characterized by the geometric patterns observed in the measured Stokes vector parameters of the output light. These findings highlight the potential of such symmetry-broken non-vortex structures for controlled manipulation of structured light in micro- and nanoscale optical systems.