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    Area of Science:

    • Nanophotonics and Metasurfaces
    • Nonlinear Optics

    Background:

    • All-dielectric metasurfaces offer precise control over light's amplitude and phase.
    • Reconfigurable metasurfaces are crucial for advanced optical applications, but current methods are often slow or power-intensive.

    Purpose of the Study:

    • To design and demonstrate a fast, low-intensity reconfigurable metasurface for light manipulation.
    • To utilize the nonlinear optical properties of arsenic trisulfide (As2S3) glass for dynamic beam shaping.

    Main Methods:

    • Fabrication of an As2S3 chalcogenide glass metasurface.
    • Experimental demonstration of beam reshaping from Hermite-Gaussian to orbital angular momentum (OAM) beams.
    • Characterization of optical properties at varying intensity levels.

    Main Results:

    • The As2S3 metasurface successfully reshaped a non-OAM beam into an OAM beam at low light intensities.
    • The metasurface preserved the original beam's amplitude and phase characteristics at high intensities.
    • Demonstrated ultra-fast and low-intensity reconfigurability.

    Conclusions:

    • Arsenic trisulfide glass is a promising material for creating fast, low-intensity reconfigurable metasurfaces.
    • The developed metasurface enables dynamic control of light's orbital angular momentum.
    • Potential applications in next-generation optical communication and signal processing systems.