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Multichannel joint-polarization-frequency-modulation encrypted metasurface in secure THz communication.

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    This study presents a novel metasurface for secure wireless communication. It uses amplitude-frequency modulation with graphene layers to encrypt data, enhancing security for terahertz applications.

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    Area of Science:

    • Electromagnetic (EM) wave manipulation
    • Metasurface technology
    • Wireless communication security

    Background:

    • Wireless communication relies on EM signals for information transfer.
    • Information encryption is vital to prevent counterfeiting and unauthorized access.
    • Metasurfaces offer advanced control over EM wave properties.

    Purpose of the Study:

    • To introduce a metasurface for amplitude modulation at two distinct frequencies.
    • To present an encrypted wireless communication protocol using a chaos algorithm.
    • To enhance wireless communication security for terahertz (THz) applications.

    Main Methods:

    • Utilizing a metasurface with two distinct graphene layers for amplitude-frequency modulation.
    • Implementing a chaos algorithm for data encryption.
    • Simulating amplitude-frequency modulation for both x- and y-polarizations.

    Main Results:

    • Demonstrated simultaneous amplitude and frequency modulation for both linear polarizations.
    • Achieved secure data transmission using graphene layers controlled by biasing conditions.
    • Simulations confirmed successful encoding and transmission of image data.

    Conclusions:

    • The developed metasurface enables secure encrypted wireless communication.
    • Simultaneous modulation of amplitude, frequency, and polarization enhances security and channel capacity.
    • The protocol shows promise for THz communications, anti-counterfeiting, and data storage/transmission.