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Caractérisation du couplage optomécanique entre la lumière et un miroir : bruit thermique et effets quantiques

Abstract : We present a very sensitive optical measurement of small displacements of a mirror in a high-finesse cavity, with a sensitivity at the attometer level.
We have observed the mirror thermal noise and its temporal evolution in phase space. We have cooled the mirror by using a cold damping force and obtained a thermal noise compression in phase space.
We have determined the spatial structure of internal acoustic modes for different mirror geometries, by scanning a radiation pressure force over the mirror surface. Results are in agreement with theoretical models used for gravitational-wave interferometers and lead to an optimized geometry for the demonstration of quantum effects of optomechanical coupling.
We finally present a theoretical study of thermal and quantum noises in a new scheme of gravitational-wave antenna based on dual spheres.
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https://tel.archives-ouvertes.fr/tel-00004972
Contributor : Tristan Briant <>
Submitted on : Monday, February 23, 2004 - 11:18:56 AM
Last modification on : Thursday, October 29, 2020 - 3:01:21 PM
Long-term archiving on: : Friday, April 2, 2010 - 7:26:23 PM

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  • HAL Id : tel-00004972, version 1

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Tristan Briant. Caractérisation du couplage optomécanique entre la lumière et un miroir : bruit thermique et effets quantiques. Physique Atomique [physics.atom-ph]. Université Pierre et Marie Curie - Paris VI, 2003. Français. ⟨tel-00004972⟩

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