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Arithmetic logic unit based on the metastructure with coherent absorption.

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    This study introduces an optical half-adder using a metastructure with coherent absorption. This device performs binary logic operations, enabling advancements in optical processing and encryption.

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    Area of Science:

    • Optoelectronics
    • Metamaterials
    • Optical Computing

    Background:

    • Metamaterials offer unique electromagnetic properties.
    • Coherent absorption is a phenomenon with potential applications in signal processing.
    • Optical computing requires efficient logic gates.

    Purpose of the Study:

    • To propose and demonstrate an arithmetic logic unit (ALU) based on metastructures with coherent absorption.
    • To enable an optical half-adder capable of performing AND and exclusive OR operations.
    • To explore the application of this ALU in optical processing and encryption.

    Main Methods:

    • Designing a metastructure exhibiting coherent absorption.
    • Utilizing graphene's chemical potential to control input signals.
    • Employing coherent electromagnetic waves with adjustable phase differences.
    • Analyzing dynamic absorption peaks for logical outputs.

    Main Results:

    • The proposed ALU successfully performs AND and exclusive OR logical operations at a single frequency.
    • The device functions as an optical half-adder.
    • Dynamic absorption peaks accurately represent carry and sum bits.

    Conclusions:

    • The developed ALU based on metastructures with coherent absorption is a novel approach for optical logic operations.
    • This work advances the understanding and application of coherent absorption in optical systems.
    • The ALU has potential applications in optical processing, encryption, and Hamming code processing.