Dynamique des électrons corrélés en champ laser intense

Abstract : Latest advances in laser sources are such that it is now possible to observe, in real-time, phenomena occurring in atoms and molecules under the effect of an intense and ultra-fast external field. The increasing complexity of these experiments and the processes under scrutiny give rise to a number of questions concerning the multielectron dynamics of such systems. For example, in a recent work on CO2 molecule, a molecular imaging technique exploiting interference structures in the high harmonic emission signal was proposed. Such interferences are directly correlated to the molecular geometry but are also influenced by diverse multielectron effects that govern the relative importance of possible ionization channels, making their interpretation difficult. The developement of accurate theoretical models capable of addressing such questionings thus takes a significant importance. The complete understanding of how these processes take place allow one to control them with better ease and to gain meaningful insights on these kinds of experiments. Therefore, our methodology developments are precisely intended to unveil the nature of multielectron effects on the dynamics of polyatomic molecules driven by intense laser fields. The complete development of a general Time-Dependent Multi-Configuration Self-Consistent Field (TDMCSCF) methodology \cite{Nguyen-Dang2007, Nguyen-Dang2009} will be presented and illustrated with preliminary results obtained for some simple molecular systems. Finally, some useful applications of the study of electron dynamics, such as dynamic molecular imaging, will be discussed.
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Autre. Université Paris Sud - Paris XI, 2012. Français. <NNT : 2012PA112096>

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  • HAL Id : tel-00712662, version 1



Michel Peters. Dynamique des électrons corrélés en champ laser intense. Autre. Université Paris Sud - Paris XI, 2012. Français. <NNT : 2012PA112096>. <tel-00712662>




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