Experimental optomechanics with silicon micromirrors

Abstract : We experimentally demonstrate the high-sensitivity optical monitoring of moving micromirrors, made of low-loss dielectric coatings upon silicon resonators of various shapes and sizes. The very high optical finesses obtained (\mathcal{F}\simeq 30\,000 ) have allowed us to measure the thermal noise of the micromirrors at room temperature with a shot-noise limited sensitivity at the 10^{-19}\,{\rm m}/\sqrt{\rm Hz} level and to completely characterize their mechanical behavior, in excellent agreement with the results of a finite-element computation. Applications of such optomechanical systems range from quantum optics experiments to the experimental demonstration of the quantum ground state of a macroscopic mechanical resonator.
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Olivier Arcizet, C. Molinelli, T. Briant, P.-F. Cohadon, A. Heidmann, et al.. Experimental optomechanics with silicon micromirrors. New Journal of Physics, Institute of Physics: Open Access Journals, 2008, 10, pp.125021. ⟨10.1088/1367-2630/10/12/125021⟩. ⟨in2p3-00347257⟩

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