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High-efficiency thermo-optic switch based on waveguide superlattices with artificial gauge field.

Xuelin Zhang, Jiangbing Du, Jian Li

    Optics Express
    |September 23, 2025
    PubMed
    Summary

    We developed an ultra-efficient silicon thermo-optic Mach-Zehnder switch using waveguide superlattices. This novel design significantly reduces power consumption for optical switches in integrated photonics.

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    Area of Science:

    • Photonics and Integrated Optics
    • Materials Science

    Background:

    • Optical switches are essential for data communications, sensing, and computing.
    • Existing designs often require significant power and thermal management.

    Purpose of the Study:

    • To demonstrate an ultra-efficient silicon thermo-optic Mach-Zehnder switch.
    • To reduce power consumption in photonic integrated circuits.

    Main Methods:

    • Experimental demonstration of a silicon thermo-optic Mach-Zehnder switch.
    • Utilizing waveguide superlattices with an artificial gauge field.
    • Applying a sinusoidal modulation profile to a binary waveguide array.

    Main Results:

    • Achieved ultra-low power consumption of 1.21 mW.

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  • Demonstrated efficient light transmission with low crosstalk.
  • No additional thermal isolation was required.

    • Conclusions:

    • Geometric design optimization is key for compact, high-efficiency devices.
    • This approach significantly reduces power consumption in photonic integrated circuits.
    • The method offers scalability for large-scale photonic integrated circuits.