C. Michel
Centre national de la recherche scientifique
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Publication
Featured researches published by C. Michel.
Physical Review Letters | 2006
O. Arcizet; P. F. Cohadon; T. Briant; M. Pinard; A. Heidmann; Jean-Marie Mackowski; C. Michel; L. Pinard; O. Francais; L. Rousseau
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.
International Europhysics Conference on High Energy Physics HEP 93 | 1997
J.-Y. Vinet; F. Bondu; A. Brillet; F. Cleva; H. Heitmann; L. Latrach; N. Man; M. Pham Tu; M. Barsuglia; V. Brisson; F. Cavalier; M. Davier; P. Hello; P. Heusse; F. Lediberder; P. Marin; B. Caron; A. Dominjon; C. Drezen; R. Flaminio; X. Grave; F. Marion; L. Massonet; C. Mehmel; R. Morand; B. Mours; V. Sannibale; M. Yvert; L. Dognin; P. Ganau
The Virgo project is a Italian-French collaboration aiming at the construction of a long baseline interferometric antenna for the detection of gravitational radiation signals of cosmic origin. We describe the principles of the system, and high-light the technical challenges we need to overcome for reaching a sensitiity as low as 10−23Hz−1/2.The gravitational clustering of collisionless particles in an expanding universe is modelled using some simple physical ideas. I show that it is possible to understand the nonlinear clustering in terms of three well defined regimes: (1) linear regime; (2) quasilinear regime which is dominated by scale-invariant radial infall and (3) nonlinear regime dominated by nonradial motions and mergers. Modelling each of these regimes separately I show how the nonlinear two point correlation function can be related to the linear correlation function in hierarchical models. This analysis leads to results which are in good agreement with numerical simulations thereby providing an explanation for numerical results. Using this model and some simple extensions, it is possible to understand the transfer of power from large to small scales and the behaviour of higher order correlation functions. The ideas presented here will also serve as a powerful analytical tool to investigate nonlinear clustering in different models.
Applied Physics Letters | 2011
Aurélien Kuhn; M. Bahriz; O. Ducloux; Claude Chartier; O. Le Traon; T. Briant; P.-F. Cohadon; A. Heidmann; C. Michel; L. Pinard; R. Flaminio
We have designed a micromechanical resonator suitable for cavity optomechanics. We have used a micropillar geometry to obtain a high-frequency mechanical resonance with a low effective mass and a very high quality factor. We have coated a 60-μm diameter low-loss dielectric mirror on top of the pillar and are planning to use this micromirror as part of a high-finesse Fabry-Perot cavity to laser cool the resonator down to its quantum ground state and to monitor its quantum position fluctuations by quantum-limited optical interferometry.
Applied Optics | 2017
L. Pinard; C. Michel; B. Sassolas; Laurent Balzarini; J. Degallaix; V. Dolique; R. Flaminio; D. Forest; M. Granata; B. Lagrange; N. Straniero; Julien Teillon; G. Cagnoli
For the first time, direct detection of gravitational waves occurred in the Laser Interferometer Gravitational-wave Observatory (LIGO) interferometers. These advanced detectors require large fused silica mirrors with optical and mechanical properties and have never been reached until now. This paper details the main achievements of these ion beam sputtering coatings.
Optics Letters | 2011
L. Pinard; B Sassolas; R. Flaminio; David Forest; A Lacoudre; C. Michel; Jl Montorio; N. Morgado
The new generation of advanced interferometer needs fused silica mirrors having better optical and mechanical properties. This Letter describes the way to reduce the ion beam sputtering coating absorption at 1064 nm and to improve the layer thickness uniformity in order to coat two large mirrors (diameter 35 cm) at the same time.
The Astrophysical Journal | 2017
B. Abbott; P. Bacon; M. Barsuglia; Y. Bouffanais; C. Buy; E. Capocasa; E. Chassande-Mottin; D. Fiorucci; E.O. Lebigot; M. Tacca; M. Boer; G. Bogaert; A. Brillet; F. Cleva; J. P. Coulon; J. D. Fournier; H. Heitmann; F. Kéfélian; N. Man; L. Martellini; D. Meacher; M. Merzougui; M. Pichot; T. Regimbau; M. Turconi; J.-Y. Vinet; L. W. Wei; F. Bondu; T. Briant; S. Chua
We present the results of the search for gravitational waves (GWs) associated with γ-ray bursts detected during the first observing run of the Advanced Laser Interferometer Gravitational-Wave Observatory (LIGO). We find no evidence of a GW signal for any of the 41 γ-ray bursts for which LIGO data are available with sufficient duration. For all γ-ray bursts, we place lower bounds on the distance to the source using the optimistic assumption that GWs with an energy of
Physical Review A | 2011
C. Michel; Bertrand Kibler; Antonio Picozzi
{10}^{-2}{M}_{odot }{c}^{2}
Applied Physics Letters | 2014
Aurélien Kuhn; J. Teissier; Leonhard Neuhaus; Salim Zerkani; E. van Brackel; S. Deléglise; T. Briant; P. F. Cohadon; A. Heidmann; C. Michel; L. Pinard; V. Dolique; R. Flaminio; Rachid Taibi; Claude Chartier; O. Le Traon
were emitted within the
SPIE Optical Systems Design | 2012
C. Michel; N. Morgado; L. Pinard; B. Sassolas; R. Bonnand; J. Degallaix; D. Forest; R. Flaminio; G. Billingsley
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Nature Communications | 2018
C. Michel; Omar Boughdad; Mathias Albert; Pierre-Élie Larré; Matthieu Bellec
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