title: Femtosecond time-resolved electronic relaxation dynamics in tetrathiafulvalene.
abstract: In the present paper, the ultrafast electronic relaxation of tetrathiafulvalene (TTF) initiated around 4 eV is studied by femtosecond time-resolved velocity-map imaging. The goal is to investigate the broad double structure observed in the absorption spectrum at this energy. By monitoring the transients of the parent cation and its fragments and by varying the pump and the probe wavelengths, two internal conversions and intramolecular vibrational relaxation are detected both on the order of a few hundred of femtoseconds. Photoelectron images permit the assignment of a dark electronic state involved in the relaxation. In addition, the formation of the dimer of TTF has been observed.
authors.affiliation: Laboratoire de Collisions, Agrégats et Réactivité, IRSAMC, Université de Toulouse-CNRS, 31062 Toulouse, France.
authors.forename: D
authors.initials: D
authors.lastname: Staedter
authors.affiliation: Laboratoire de Collisions, Agrégats et Réactivité, IRSAMC, Université de Toulouse-CNRS, 31062 Toulouse, France.
authors.forename: N
authors.initials: N
authors.lastname: Thiré
authors.affiliation: Laboratoire de Collisions, Agrégats et Réactivité, IRSAMC, Université de Toulouse-CNRS, 31062 Toulouse, France.
authors.forename: L
authors.initials: L
authors.lastname: Polizzi
authors.affiliation: Centre des Laser Intenses et Applications, Université de Bordeaux-CNRS, 33405 Talence, France.
authors.forename: Y
authors.initials: Y
authors.lastname: Mairesse
authors.affiliation: Chemistry Department, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.
authors.forename: P
authors.initials: P
authors.lastname: Mayer
authors.affiliation: Laboratoire de Collisions, Agrégats et Réactivité, IRSAMC, Université de Toulouse-CNRS, 31062 Toulouse, France.
authors.forename: V
authors.initials: V
authors.lastname: Blanchet