A micromechanical resonator to reach the quantum regime
| Autor: | Antoine Heidmann, R. Flaminio, Pierre-François Cohadon, L. Pinard, Michael Bahriz, O. Ducloux, C. Molinelli, S. Masson, Christophe Michel, Denis Janiaud, Aurélien Kuhn, Tristan Briant, O. Le Traon |
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| Přispěvatelé: | Girod, Dominique, Laboratoire des matériaux avancés (LMA), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Dielectric resonator antenna
Materials science business.industry Physics::Optics 02 engineering and technology Output coupler 021001 nanoscience & nanotechnology Laser 01 natural sciences law.invention Resonator Surface micromachining Interferometry Optics law [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] Q factor 0103 physical sciences [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] 010306 general physics 0210 nano-technology business Helical resonator ComputingMilieux_MISCELLANEOUS |
| Zdroj: | HAL IEEE Sensors 2010 proceeding The 9th Annual IEEE Conference on Sensors, IEEE Sensors 2010 Conference The 9th Annual IEEE Conference on Sensors, IEEE Sensors 2010 Conference, Nov 2010, Waikoloa, United States. pp.1991 |
| Popis: | We present a new micromechanical resonator designed for the observation of its quantum ground state (QGS). To reach QGS, a high frequency resonator with the lowest possible mass and the highest possible quality factor, coupled with an extremely sensitive measurement technique, has to be implemented. Using a high-finesse Fabry-Perot cavity with a mirror coated on the resonator, we expect benefits from the unique sensitivity of optical interferometry (10−38 m2/Hz) and from the optomechanical coupling between the light and the micro-resonator both to laser cool the resonator down to its ground state and to observe its residual quantum position fluctuations. We present the resonator we have developed for that purpose, which takes advantage from the high intrinsic quality factor of single crystal quartz and is designed to obtain a high resonance frequency (a few MHz) as well as a low mass (a few tens of µg). A length extension mode is used in order to avoid any deformation of the mirror surface and so to preserve the intrinsic quality factor of the resonator. A dedicated crystallographic orientation and a beam equilateral cross-section have been defined with respect to the quartz trigonal symmetry, allowing the micromachining of the resonator by wet etching. A beam cross-section area of 10−2 mm2 has been chosen to ease the deposit of the multilayered mirror. First mechanical characterizations of the resonator give a resonance frequency of 3.6 MHz, with a 25 µg mass and a quality factor of 390 000. Next steps will be the coating of the low-loss mirror on the resonator and its implementation in the Fabry-Perot cavity. |
| Databáze: | OpenAIRE |
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