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  1. Home
  3. Pump-threshold-free Frequency Comb Via Cavity Floquet Engineering.
  1. Home
  3. Pump-threshold-free Frequency Comb Via Cavity Floquet Engineering.

Related Experiment Video

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Pump-threshold-free frequency comb via cavity Floquet engineering.

Sihan Wang1,2,3, Cheng Wang4, Matthijs H J de Jong4

  • 1Beijing Key Laboratory of Fault-Tolerant Quantum Computing, Beijing Academy of Quantum Information Sciences, Beijing, China.

Nature Communications
|April 28, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

We demonstrate a novel method for generating optical frequency combs using cavity Floquet engineering. This ultra-low-power approach bypasses traditional thresholds and pump detuning issues for integrated frequency comb synthesis.

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Area of Science:

  • Optics and Photonics
  • Quantum Engineering
  • Nanotechnology

Background:

  • Frequency combs are crucial for advanced technologies like communication and metrology.
  • Existing integrated frequency comb technologies rely on Pockels or Kerr nonlinearities, facing limitations.
  • Developing threshold-independent and low-power integrated comb solutions is a key research goal.

Purpose of the Study:

  • To demonstrate a new method for generating frequency combs using cavity Floquet engineering.
  • To present an ultra-low-power integrated frequency comb platform.
  • To overcome limitations of existing nonlinear-based integrated frequency combs.

Main Methods:

  • Cavity Floquet engineering by periodically modulating cavity resonance frequency with a mechanical oscillator.
  • Generating a Floquet cavity with phase-locked, equally spaced frequency components.
  • Utilizing an on-chip microwave cavity optomechanical system for comb generation.

    • Main Results:

    • Successfully generated an output frequency comb via interaction of a pump tone with the Floquet cavity.
    • Demonstrated threshold-independent operation and insensitivity to pump detuning.
    • Achieved frequency comb generation with nanowatt-scale total power consumption.

    Conclusions:

    • Cavity Floquet engineering offers a viable alternative for integrated frequency comb synthesis.
    • This method provides an ultra-low-power platform, overcoming key limitations of current technologies.
    • The approach is robust against pump detuning and operates without a pumping threshold.