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Physical Review Letters 97 (2006) 133601
High-sensitivity optical monitoring of a micro-mechanical resonator with a quantum-limited optomechanical sensor
Olivier Arcizet1, P. -F. Cohadon1, T. Briant1, M. Pinard1, A. Heidmann1, J. -M. Mackowski2, C. Michel2, L. Pinard2, O. Francais, L. Rousseau

We experimentally demonstrate the high-sensitivity optical monitoring of a micro-mechanical resonator and its cooling by active control. Coating a low-loss mirror upon the resonator, we have built an optomechanical sensor based on a very high-finesse cavity (30000). We have measured the thermal noise of the resonator with a quantum-limited sensitivity at the 10^-19 m/rootHz level, and cooled the resonator down to 5K by a cold-damping technique. Applications of our setup range from quantum optics experiments to the experimental demonstration of the quantum ground state of a macroscopic mechanical resonator.
1 :  LKB (Jussieu) - Laboratoire Kastler Brossel
2 :  LMA - Laboratoire des matériaux avancés
Physique/Physique Quantique
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