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Etude théorique et expérimentale des résonances de galerie de microsphères de silice: pièges à photons pour des expériences d'électrodynamique en cavité

Abstract : This thesis is devoted to the study of very high Q whispering gallery modes in silica microspheres, about 100μm in diameter. For these resonances the electromagnetic field propagates along an equatorial surface ring with tranverse dimensions of the order of the wavelength. These guided modes have very low losses. They exhibit a remarkable combination of strong localization of the field in a small volume and very long storage times for the photons. These two properties render these microspheres ideal as optical resonators for practical applications as well as for cavity QED experiments. This manuscript starts with a general presentation of these resonances. The experimental techniques used to observe the resonances by laser spectroscopy are then discussed, and several projects in applied and fundamental physics are analysed. Furthermore, using these modes to phase-lock a diode laser or to make new microlasers are particulary attractive. An experiment where an atomic beam is deflected by passing through the evanescent field of a whispering gallery mode is also discussed. Such an experiment would allow to demonstrate the quantized nature of a few-photon-field and to measure, by a dispersive mechanism, optical fields created by a small number of photons.
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Submitted on : Thursday, March 9, 2006 - 5:37:57 PM
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  • HAL Id : tel-00011895, version 1

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Laurent Collot. Etude théorique et expérimentale des résonances de galerie de microsphères de silice: pièges à photons pour des expériences d'électrodynamique en cavité. Physique Atomique [physics.atom-ph]. Université Pierre et Marie Curie - Paris VI, 1994. Français. ⟨tel-00011895⟩

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