Phase noise and laser-cooling limits of optomechanical oscillators

Details Phase noise and laser-cooling limits of optomechanical oscillators Phase noise and laser-cooling limits of optomechanical oscillators

2009-06-07

arxiv.org/abs/0906.1379v3

Phys. Rev. A 80, 033821 (2009)

Physics

Quantum Physics

5 pages, 2 figures, comments are welcome; reference is updated. A note is added on a similar paper recently published; revised

Scientific paper

10.1103/PhysRevA.80.033821

The noise from laser phase fluctuation sets a major technical obstacle to cool the nano-mechanical oscillators to the quantum region. We propose a cooling configuration based on the opto-mechanical coupling with two cavity modes to significantly reduce this phase noise by $(2\omega_m/\gamma)^2$ times, where $\omega_m$ is the frequency of the mechanical mode and $\gamma$ is the decay rate of the cavity mode. We also discuss the detection of the phonon number when the mechanical oscillator is cooled near the quantum region and specify the required conditions for this detection.

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