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Façonnage d'impulsions femtosecondes dans l'ultraviolet. Factorisation de grands nombres. Contrôle cohérent de systèmes atomiques et moléculaires.

Sébastien J. Weber 1
1 Femto (LCAR)
LCAR - Laboratoire Collisions Agrégats Réactivité
Abstract : In this thesis we study the shaping and characterisation of ultrashort UV pulses. Shaped femtosecond pulses are then used in various coherent control experiments. Firstly, a shaper based on a acousto-optic interaction is described. Then its capabilities for shaping and tuning in the UV range are analyzed and experimentally tested. Finally we describe different applications using this shaper. Secondly, we use another shaper in the near-infrared to perform two types of experiments. The first one deals with factorisation of numbers using Gauss sums. This experiment use shaped pulses train to produce a Gauss sum and then to factorise different numbers. The second one deals with coherent control of atomic and molecular systems. We investigate the role of a shaped probe in a pump-probe experiment. Then a overview of the control of two photon transitions is given and the intererences between the different quantum paths are illustrated by the control of the spin-orbit precession. Finally, we use shaped pulses for the incoherent control of the vibrationnal cooling of molecules.
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https://tel.archives-ouvertes.fr/tel-00511903
Contributor : Sébastien Weber <>
Submitted on : Thursday, August 26, 2010 - 3:39:10 PM
Last modification on : Friday, February 28, 2020 - 1:52:03 PM
Long-term archiving on: : Monday, November 29, 2010 - 12:01:55 PM

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  • HAL Id : tel-00511903, version 1

Citation

Sébastien J. Weber. Façonnage d'impulsions femtosecondes dans l'ultraviolet. Factorisation de grands nombres. Contrôle cohérent de systèmes atomiques et moléculaires.. Physique Atomique [physics.atom-ph]. Université de Toulouse, 2010. Français. ⟨tel-00511903⟩

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