All-dielectric metasurface designs for spin-tunable beam splitting via simultaneous manipulation of propagation and geometric phases

Metasurfaces offer diverse wavefront control by manipulating amplitude, phase, and polarization of light which is beneficial to design subwavelength scaled integrated photonic devices. Metasurfaces based tunable circular polarization (CP) beam splitting is one functionality of interest in polarization control. Here, we propose and numerically realize metasurface based spin tunable beam splitter which splits the incoming CP beam into two different directions and tune the splitting angles by switching the handedness of incident light polarization. The proposed design approach has potential in applications such as optical communication, multiplexing, and imaging. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

Automated summary

Metasurfaces-based spin tunable beam splitter is proposed and numerically realized in this study, which splits the incoming circularly polarized beam into two different directions and tunes the splitting angles by switching the handedness of incident light polarization. The proposed design approach has potential applications in optical communication, multiplexing, and imaging.