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    Area of Science:

    • Photonics and Optical Engineering
    • Quantum Computing
    • Nonlinear Optics

    Background:

    • Fredkin gates are fundamental reversible logic gates crucial for quantum computing and optical switching.
    • Existing designs often face limitations in speed and integration.
    • Optical nonlinear resonators offer potential for high-speed all-optical logic operations.

    Purpose of the Study:

    • To propose and design a novel all-optical Fredkin gate.
    • To utilize nonlinear optical resonators for achieving high-speed switching functionality.
    • To explore the feasibility of integrating these components for optical computing.

    Main Methods:

    • The design employed three different types of optical nonlinear resonators.
    • Resonators were modified to enable horizontal switching functionality.
    • The final structure integrated four wide-band resonators, twelve sharp resonators, and four nonlinear ring resonators.

    Main Results:

    • The proposed all-optical Fredkin gate design was successfully conceptualized.
    • Simulation results indicated a maximum rise time of approximately 5 picoseconds.
    • The integration of various resonator types demonstrated a viable approach for optical switching.

    Conclusions:

    • The designed all-optical Fredkin gate shows promise for high-speed optical computing.
    • The use of modified nonlinear optical resonators is effective for achieving fast switching.
    • This work contributes to the advancement of photonic logic devices.