title: Time-resolved measurement of surface diffusion induced by femtosecond laser pulses.
abstract: Diffusion of atomic oxygen on a vicinal Pt111 surface induced by femtosecond laser pulses has been studied using optical second-harmonic generation as a sensitive in situ probe of the step coverage. Time-resolved studies of the hopping rate for step-terrace diffusion with a two-pulse correlation scheme reveal a time constant of 1.5 ps for the energy transfer from the electronic excitation of the substrate to the frustrated translations of the adsorbate.
authors.affiliation: Fachbereich Physik und Zentrum für Materialwissenschaften, Philipps-Universität, D-35032 Marburg, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Stépán
authors.forename: J
authors.initials: J
authors.lastname: Güdde
authors.forename: U
authors.initials: U
authors.lastname: Höfer