Squeezing a thermal mechanical oscillator by stabilized parametric effect on the optical spring

Abstract

We report the confinement of an optomechanical micro-oscillator in a squeezed thermal state, obtained by parametric modulation of the optical spring. We propose and implement an experimental scheme based on parametric feedback control of the oscillator, which stabilizes the amplified quadrature while leaving the orthogonal one unaffected. This technique allows us to surpass the -3dB limit in the noise reduction, associated to parametric resonance, with a best experimental result of -7.4dB. In a moderately cooled system, our technique can be efficiently exploited to produce strong squeezing of a macroscopic mechanical oscillator below the zero-point motion.

12 pages,6 figures

References in corpus (3)

• Sideband Cooling Micromechanical Motion to the Quantum Ground State
• Back-action evasion and squeezing of a mechanical resonator using a cavity detector
• Position Estimation of a Parametrically Driven Optomechanical System

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