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Updated: Nov 25, 2025

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Tunable metamaterial-based silicon waveguide.

Yuxi Han, Jie Lin, Yu-Sheng Lin

    Optics Letters
    |December 16, 2020
    PubMed
    Summary
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    This study introduces a tunable metamaterial (MM)-based silicon waveguide. The device offers efficient light modulation and switching, with potential applications in optical devices.

    Area of Science:

    • Photonics and Nanotechnology
    • Materials Science

    Background:

    • Silicon photonics is crucial for integrated optical circuits.
    • Metamaterials offer unique light manipulation properties.

    Purpose of the Study:

    • To develop a tunable metamaterial-based silicon waveguide.
    • To demonstrate efficient light modulation and switching capabilities.

    Main Methods:

    • Fabrication of a silicon waveguide with an array of metamaterial nanodisks.
    • Systematic variation of metamaterial column numbers (MM-1 to MM-5).
    • Characterization of transmission intensity modulation at 1.525 µm.

    Main Results:

    • Transmission intensity was attenuated from 100% to 0% by increasing metamaterial columns.

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  • Switching between on/off states was achieved by driving nanodisk columns.
  • The MM-5 device showed a linear relationship between resonance dips and refractive indices.

    • Conclusions:

    • The proposed metamaterial-based silicon waveguide enables tunable light modulation and switching.
    • The design is suitable for optical switch, variable optical attenuator, and sensor applications.
    • This work advances integrated photonic device capabilities.