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THÈSE DE DOCTORAT pour obtenir le grade de Docteur de l’Université Pierre et Marie Curie Cohérence temporelle d’un exciton sur un fil quantique organique unique

Jérémy Holcman 1 
1 INSP-E1 - Nanostructures et systèmes quantiques
INSP - Institut des Nanosciences de Paris
Abstract : The nature of this work is spectroscopic at the scale of the single object. We report on the first coherent control experiments mainly on a purely electronic exciton state in an extended quasi-perfect organic quantum wire, a polydiacetylene chain isolated in the crystalline matrix of its own monomer. The time-integrated luminescence of a single wire is measured as the relative phase between two exciting sub-picosecond laser pulses is varied. From visibility functions the exciton dephasing time is extracted and its temperature dependence studied between 4 K and 25 K. Our work points the predominant role of thermalization upon the phase relaxation dynamics. By means of microscopic imaging spectroscopy we also show that despite local excitation coherent control is achieved on states delocalized over the chain at the micrometric scale.
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https://tel.archives-ouvertes.fr/tel-01531946
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Submitted on : Tuesday, June 6, 2017 - 10:24:43 AM
Last modification on : Saturday, January 15, 2022 - 3:44:42 AM
Long-term archiving on: : Thursday, September 7, 2017 - 12:30:00 PM

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  • HAL Id : tel-01531946, version 1

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Jérémy Holcman. THÈSE DE DOCTORAT pour obtenir le grade de Docteur de l’Université Pierre et Marie Curie Cohérence temporelle d’un exciton sur un fil quantique organique unique. Matière Condensée [cond-mat]. Université Pierre et Marie Curie (Paris VI), 2012. Français. ⟨tel-01531946⟩

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