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    Area of Science:

    • Optics and Photonics
    • Information Security
    • Holography

    Background:

    • Orbital angular momentum (OAM) multiplexing offers high capacity for optical encryption.
    • Current holographic methods face limitations in information capacity and security.

    Purpose of the Study:

    • To propose and demonstrate a novel petal OAM holographic scheme for 2D optical encryption.
    • To leverage dual degrees of freedom (OAM states and phase) for enhanced security and capacity.

    Main Methods:

    • Constructing superposition modes of ±ℓ OAM states with phase φ.
    • Utilizing strong mode selectivity for multi-image integration into a single hologram.
    • Conducting simulations and experimental validations of the petal OAM scheme.

    Main Results:

    • Demonstrated preservation and selective addressing of petal OAM modes.
    • Achieved doubling of information capacity through multi-image integration.
    • Successfully implemented a 2D high-security encryption platform.

    Conclusions:

    • The petal OAM holographic scheme effectively enhances optical encryption capacity and security.
    • This approach provides a robust anti-counterfeiting solution using multi-parameter optical encryption.
    • Pioneers OAM degree-of-freedom synergy for advanced holographic security systems.