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Optomechanics Driven by Noisy and Narrowband Fields
Louise Banniard1, Cheng Wang1, Davide Stirpe2
1Department of Applied Physics, Aalto University, 00076 Aalto, Finland.
Journal of Low Temperature Physics
|November 15, 2024
Summary
Noise-driven cavity optomechanics exhibits anti-damping and self-oscillation. Narrowband driving reveals unique phenomena, including adiabatic following and threshold shifts, deviating from standard models.
Area of Science:
- Physics
- Quantum Optics
- Optomechanics
Background:
- Cavity optomechanics studies the interaction between light and mechanical motion within an optical cavity.
- Resolved-sideband limit describes systems where optical frequencies are far from mechanical resonances.
Purpose of the Study:
- Investigate cavity optomechanical systems driven by narrowband electromagnetic fields.
- Explore the effects of noise and structured spectra on mechanical oscillator dynamics.
- Analyze deviations from standard optomechanical descriptions.
Main Methods:
- Driving a cavity optomechanical system with narrowband electromagnetic fields (noise or coherent tones).
- Operating within the resolved-sideband limit.
- Analyzing the mechanical oscillator's response to different driving spectra.
Main Results:
- Blue-detuned noise driving induces anti-damping and self-oscillation, comparable to coherent driving.
- Reduced noise bandwidth leads to adiabatic following and a significant shift in the self-oscillation threshold.
- Narrowband driving with two coherent tones shows deviations from naive optomechanical predictions.
Conclusions:
- Noise-induced interactions can lead to dynamical amplification in optomechanical systems.
- Adiabatic following of noise profiles significantly alters self-oscillation dynamics.
- Standard optomechanical models require refinement for narrowband and structured driving spectra.
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