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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Pancharatnam-Berry phase enables advanced optical manipulation.
    • Generating optical vortices with controllable spin-orbital angular momentum is crucial for optical applications.

    Purpose of the Study:

    • To devise and experimentally demonstrate a liquid crystal device for efficient generation of transflected optical vortices.
    • To investigate the spin-orbital angular momentum conversion in both transmitted and reflected light.

    Main Methods:

    • Utilized photo-alignment and polymer-alignment materials to assemble liquid crystal polymer and cholesteric liquid crystal.
    • Employed Pancharatnam-Berry phase for optical vortex generation.
    • Investigated the modulation of transmitted and reflected beams by input polarization.

    Main Results:

    • Achieved high-efficiency generation of transflected optical vortices.
    • Demonstrated spin-orbital angular momentum conversion in both transmitted and reflected light.
    • Showcased modulation of beam properties via input polarization.

    Conclusions:

    • The proposed liquid crystal device is dual-functional, efficient, and cost-effective.
    • The device offers a simple manufacturing process for optical vortex generation.
    • This technology has potential applications in optical communications and information processing.