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Related Experiment Video

Updated: Oct 17, 2025

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
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Single-layer graphene optical modulator based on arrayed hybrid plasmonic nanowires.

Zhikai Li, Jiyuan Huang, Zhuohang Zhao

    Optics Express
    |October 7, 2021
    PubMed
    Summary

    This study introduces a tunable graphene optical modulator using hybrid plasmonic nanowires. The device enhances light-matter interactions for efficient modulation, offering potential for advanced optoelectronic devices.

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    Area of Science:

    • Photonics and Optoelectronics
    • Materials Science
    • Nanotechnology

    Background:

    • Surface plasmon-polaritons (SPPs) are crucial for light manipulation.
    • Graphene's 2D nature requires enhanced light-matter interaction for device applications.
    • Hybrid plasmonic nanowires offer subwavelength confinement and long propagation distances.

    Purpose of the Study:

    • To propose and demonstrate a tunable graphene optical modulator.
    • To leverage gap-surface plasmonic modes (GSPMs) and near-field coupling for enhanced light-matter interaction.
    • To optimize modulation depth, insertion loss, and bandwidth.

    Main Methods:

    • Design of an arrayed hybrid plasmonic nanowire structure.
    • Utilizing periodic metasurface for strong subwavelength confinement.

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  • Graphene integration for tunable optical modulation.

    • Main Results:

    • Achieved a typical modulation depth (MD) of 4.7 dB/μm and insertion loss (IL) of 0.045 dB/μm.
    • Optimized performance yielded MD of 16.7 dB/μm and IL of 0.17 dB/μm.
    • Demonstrated a 3 dB bandwidth of 200 GHz with low energy consumption (0.86 fJ/bit).

    Conclusions:

    • The proposed graphene optical modulator exhibits excellent performance.
    • The design is compatible with fabrication and offers integration potential.
    • This work paves the way for 2D material-based optoelectronic devices.