title: Femtosecond vibrational dynamics of self-trapping in a quasi-one-dimensional system
abstract: We have directly time resolved the lattice motions associated with the formation of the self-trapped exciton in the quasi-one-dimensional system [Pt(en)(2)] [Pt(en)2Br2];(PF6)(4) ( en = ethylene-diamine, C2H8N2), using femtosecond impulsive excitation techniques. A strongly damped, low-frequency wave packet modulation at approximately 110 cm(-1) accompanies the formation of the self-trapped exciton on a approximately 200 fs time scale following excitation of the intervalence charge-transfer transition. Coherent oscillations at the ground state vibrational frequency and its harmonics are also detected.
authors.affiliation: Department of Physics, Washington State University, Pullman, Washington 99164-2814, USA.
authors.initials: SL
authors.lastname: Dexheimer
authors.lastname: Van Pelt AD
authors.initials: JA
authors.lastname: Brozik
authors.initials: BI
authors.lastname: Swanson