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Related Experiment Video

Updated: Jul 4, 2025

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Non-volatile 2 × 2 optical switch using multimode interference in an Sb2Se3-loaded waveguide.

Kun Shang, Lei Niu, Huimin Jin

    Optics Letters
    |February 1, 2024
    PubMed
    Summary

    We developed a novel non-volatile photonic switch using Sb2Se3-loaded waveguides. This compact device offers efficient switching with low loss and crosstalk, crucial for future optical circuits.

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    Area of Science:

    • Photonics
    • Materials Science
    • Integrated Optics

    Background:

    • Non-volatile photonic switches are essential for advanced optical communication systems.
    • Phase-change materials offer unique properties for optical switching applications.

    Purpose of the Study:

    • To propose and demonstrate a non-volatile 2x2 photonic switch.
    • To leverage the phase transition properties of Sb2Se3 for optical switching.

    Main Methods:

    • Utilizing multimode interference in an Sb2Se3-loaded waveguide.
    • Employing finite-difference time-domain (FDTD) optimization for waveguide design.
    • Fabricating and characterizing the optical switch performance.

    Main Results:

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  • Achieved efficient switching due to distinct changes in propagation constants of TE0 and TE1 modes.
  • Demonstrated low insertion loss (~1 dB) and compact device length (~27 µm).
  • Exhibited low crosstalk (< -15 dB) over a 35 nm bandwidth.

    • Conclusions:

    • The developed photonic switch is non-volatile and broadband.
    • This technology is critical for high-density programmable photonic-integrated circuits.
    • Potential applications include optical communications and signal processing.