Dynamique femtoseconde de la liaison hydrogène

Abstract : A pump-probe experiment is described to study femtosecond dynamics of hydrogen bonds in liquid water. The key element of the experimental setup is a laser source emitting 150 fs pulses in the 2.5-4.4 urn spectral region, at 10 nJ power level. The OH-stretching band is recorded for different excitation frequencies and different pump-probe delay times. Time-dependent solvatochromic shifts are observed and are interpreted with the help of statistical mechanics of nonlinear optical processes. Using these spectral data, the OH -O motions are "photographed" in real time. Cop. EDP Sciences.
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Guilhem Gallot, Noëlle Lascoux, Geoffrey Gale, François Hache. Dynamique femtoseconde de la liaison hydrogène. 6èmes Colloque sur les Lasers et l'Optique Quantique, May 2000, France. pp.Pr8-87, ⟨10.1051/jp4:2000811⟩. ⟨hal-00841151⟩

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