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Statut |
Confirmé |
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Série |
SEM-LKB |
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Domaines |
quant-ph |
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Date |
Mercredi 26 Fevrier 2020 |
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Heure |
13:45 |
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Institut |
LKB |
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Salle |
Ecole Normale supérieure – 24, rue Lhomond – Conf IV – 75005 Paris |
|
Nom de l'orateur |
Simonet |
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Prenom de l'orateur |
Juliette |
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Addresse email de l'orateur |
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Institution de l'orateur |
University of Hamburg |
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Titre |
Ultracold meets Ultrafast |
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Résumé |
Ultrashort laser pulses grant access to an instantaneous and controlled
creation of electrons and ions in a quantum gas. A single femtosecond laser
pulse can ionize up to several thousand atoms, thus triggering the formation
of strongly coupled ultracold plasmas.
We report on the observation of ultrafast electron cooling in an expanding
micro-plasma from 5000 K to about 1 K within less than one picosecond. Our
experimental setup allows measuring the electronic kinetic energy distribution
with meV resolution. Furthermore, we have performed numerical simulations of
the plasma dynamics that are in excellent agreement with the measurements and
provide insights into the thermalization mechanisms on sub-nanosecond
timescales. |
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Numéro de preprint arXiv |
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Commentaires |
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Fichiers attachés |
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