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Related Experiment Video

Updated: Dec 9, 2025

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
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High-precision millimeter-wave frequency determination through plasmonic photomixing.

Ning Wang, Mona Jarrahi

    Optics Express
    |September 10, 2020
    PubMed
    Summary

    We developed a new method for precise millimeter-wave frequency measurement using plasmonic photomixing. This technique achieves high accuracy without needing to phase-lock optical frequency combs.

    Area of Science:

    • Physics
    • Electrical Engineering
    • Metrology

    Background:

    • Millimeter-wave (mmWave) frequencies are crucial for advanced communication and sensing.
    • Accurate frequency determination in the mmWave range presents significant metrological challenges.
    • Existing methods often require complex setups or phase-locking mechanisms.

    Purpose of the Study:

    • To introduce a novel technique for high-precision millimeter-wave frequency determination.
    • To leverage plasmonic photomixing for down-conversion of mmWave signals.
    • To achieve high accuracy without phase-locking an optical frequency comb.

    Main Methods:

    • Utilizing a plasmonic photomixer device.
    • Employing an optical frequency comb as a local oscillator.

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  • Down-converting the mmWave signal to the radio frequency (RF) domain for measurement.
  • Characterizing frequency stability via the optical beat frequency.

    • Main Results:

    • Demonstrated frequency measurement precision as low as 3.9×10-10 at 95 GHz.
    • Successful operation without phase-locking the optical frequency comb.
    • The precision is directly linked to the optical beat frequency stability.

    Conclusions:

    • Plasmonic photomixing offers a viable pathway for high-precision mmWave frequency metrology.
    • The technique simplifies experimental requirements by eliminating the need for phase-locking.
    • This method has potential applications in advanced communication systems and scientific instrumentation.