Berlin 2001 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 10: Ultrafast Spectroscopy
CPP 10.2: Vortrag
Donnerstag, 5. April 2001, 16:05–16:25, 110
Ultrafast Dynamics of Hydrogen Bonds probed by Infrared Photon Echo Spectroscopy — •Jens Stenger1, Dorte Madsen2, Peter Hamm1, Erik T.J. Nibbering1, Jens Dreyer1, and Thomas Elsaesser1 — 1Max-Born-Institut für nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Strasse 2A, D-12489 Berlin — 2Department of Chemistry, University of Århus, Langelandsgade 140, DK-8000 Århus C
Hydrogen bonding is of fundamental importance for structure and dynamics of molecular systems. This distinctiveness among chemical bonds is accompanied by exceptional spectroscopic properties. In the infrared absorption spectrum the OH-stretch vibration within a hydrogen bond exhibits an extreme broadening as well as a peculiar substructure. The broadening mechanisms of this vibrational band in the condensed phase are studied by photon echo spectroscopy with femtosecond infrared laser pulses. We separate with this four wave mixing technique homogeneous and inhomogeneous broadening as well as spectral diffusion and coherent coupling of low frequency modes.