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    Area of Science:

    • Photonics and Optical Engineering
    • Metasurface Technology
    • Analog Optical Computing

    Background:

    • Analog optical computing offers low power and high parallelism at light speed.
    • Traditional 4F optical systems are bulky and complex.
    • Need for miniaturized, efficient optical computing architectures.

    Purpose of the Study:

    • To propose and demonstrate a novel, ultra-miniaturized on-chip 2F optical analog computing structure.
    • To simplify optical computing systems while maintaining accuracy.
    • To leverage metasurfaces for advanced optical functionalities.

    Main Methods:

    • Designed an on-chip 2F optical system utilizing metasurfaces.
    • Implemented phase compensation and complex amplitude modulation.
    • Fabricated a silicon-on-insulator based optical differentiator.

    Main Results:

    • Achieved an ultra-miniaturized optical analog computing system.
    • Demonstrated a simplified structure compared to traditional 4F systems.
    • Obtained 84.01% (simulation) and 79.81% (experiment) differentiation accuracy.

    Conclusions:

    • The novel on-chip 2F structure enables ultra-miniaturized analog optical computing.
    • Metasurfaces provide design flexibility for compact and accurate optical systems.
    • This work paves the way for next-generation integrated photonic computing devices.