title: High-sensitivity optical monitoring of a micromechanical resonator with a quantum-limited optomechanical sensor.
abstract: We experimentally demonstrate the high-sensitivity optical monitoring of a micromechanical 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 (30 000). We have measured the thermal noise of the resonator with a quantum-limited sensitivity at the 10(-19) m/sqrt[Hz] level, and cooled the resonator down to 5 K 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.
authors.affiliation: Laboratoire Kastler Brossel, Université Pierre et Marie Curie, Case 74, 4 place Jussieu, F75252 Paris Cedex 05, France.
authors.forename: O
authors.initials: O
authors.lastname: Arcizet
authors.forename: P-F
authors.initials: PF
authors.lastname: Cohadon
authors.forename: T
authors.initials: T
authors.lastname: Briant
authors.forename: M
authors.initials: M
authors.lastname: Pinard
authors.forename: A
authors.initials: A
authors.lastname: Heidmann
authors.forename: J-M
authors.initials: JM
authors.lastname: Mackowski
authors.forename: C
authors.initials: C
authors.lastname: Michel
authors.forename: L
authors.initials: L
authors.lastname: Pinard
authors.forename: O
authors.initials: O
authors.lastname: Français
authors.forename: L
authors.initials: L
authors.lastname: Rousseau