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Etude à haute résolution de la spécularité d'un miroir atomique à onde évanescente

Véronique Savalli 1
1 laboratoire Charles Fabry de l'Institut d'Optique / Optique atomique
LCFIO - Laboratoire Charles Fabry de l'Institut d'Optique
Abstract : In this thesis we present a high resolution study of the specularity of an atomic evanescent wave mirror. For this study, velocity selective Raman transitions are used. These transitions have two uses. First a velocity selection on atoms prepared in a magneto-optical trap is made. This selection collimates the atomic wave, giving a high resolution for the specularity study. Secondly, with the Raman transitions, the atomic velocity distribution is analyzed after the bounce with the same high resolution. The experimental realisation of these transitions is first described. The specularity of an atomic evanescent wave is then measured. The observed bounce is compatible with a specular reflexion, in the case where we choose the evanescent wave detuning far from the atomic resonance. We have given an upper limit of the uncertainty of the roughness measured. We also present the realization of an optical detection of cold atoms, inducing little spontaneous emission on the atoms. This detection consists in measuring the phase induced by an atomic sample on a laser beam using frequency modulation spectroscopy techniques. During the detection, 80% of the atoms do not absorb any photon.
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Véronique Savalli. Etude à haute résolution de la spécularité d'un miroir atomique à onde évanescente. Physique Atomique [physics.atom-ph]. Université Pierre et Marie Curie - Paris VI, 2000. Français. ⟨tel-00006717⟩

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