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Confinement d'un ion unique de Ca+ pour la métrologie des fréquences optiques

Abstract : This report summarizes my research on the Ca+ ion carried out during the last decade. The preliminary spectroscopic work in a traditional Paul trap is briefly reviewed. In a cloud of hot ions the lifetimes of the metastables 3D doublet levels have been measured and collisional effects which affect these lifetimes have been investigated. To access the Lamb-Dicke regime with a single ion, a miniature trap has been built. This trap has been fully characterized, before undergoing a phase of optimization of laser cooling and reduction of the number of the particles. The observation of quantum jumps of a single ion has been used for the precise measurement of metastable level lifetimes, preparing the interrogation of the clock transition under well controlled conditions. The reduction of excess micromotion has been approached by various techniques, in particular by the observation of dark resonances using varying laser beam geometry. The work in progress on the observation of motional side bands in the spectrum of the clock transition is discussed. The theoretical study of the systematic effects prepares the experimental conditions necessary for the optical frequency metrology.
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Habilitation à diriger des recherches
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Contributor : Martina Knoop <>
Submitted on : Friday, June 10, 2005 - 5:21:14 PM
Last modification on : Thursday, January 18, 2018 - 2:26:39 AM
Long-term archiving on: : Friday, April 2, 2010 - 9:46:46 PM


  • HAL Id : tel-00009442, version 1



Martina Knoop. Confinement d'un ion unique de Ca+ pour la métrologie des fréquences optiques. Physique Atomique [physics.atom-ph]. Université de Provence - Aix-Marseille I, 2005. ⟨tel-00009442⟩



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