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    Area of Science:

    • Photonics
    • Nonlinear Optics
    • Optical Computing

    Background:

    • Optical logic gates are crucial for high-speed information processing.
    • Existing technologies face limitations in speed, latency, and integration.
    • Spatial solitons offer a promising avenue for all-optical switching.

    Purpose of the Study:

    • To introduce a new low-latency, cascadable optical logic gate.
    • To demonstrate a device with gain, high contrast, and three-terminal isolation.
    • To explore the implementation of a multi-input NOR gate.

    Main Methods:

    • Utilizing the interaction of two orthogonally polarized spatial solitons.
    • Employing a saturating nonlinear medium.
    • Exploiting phase-insensitive spatial soliton dragging for switching.

    Main Results:

    • Demonstrated an optical inverter with gain by phase-insensitive spatial dragging.
    • Achieved transmission of a strong pump soliton when a weak signal is absent.
    • Showcased blocking of the pump soliton when the weak signal is present, with displacement exceeding one beam width.

    Conclusions:

    • The developed optical logic gate is low-latency, cascadable, and exhibits gain.
    • The device provides high contrast and three-terminal input-output isolation.
    • Potential for constructing multi-input, logically complete NOR gates in cascaded systems.