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Riedle, Eberhard ORCID: 0000-0002-2672-5718; Hasche, T.; Ashworth, Stephen; Woerner, M.; Elsaesser, T. (1996): Coherent and incoherent dynamics of large molecules in solution studied on a 20 femtosecond time scale. In: Springer Series in Chemical Physics, Vol. 62: pp. 282-283
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Femtosecond pump-probe spectroscopy gives direct insight into the coherent dynamics of vibrational wavepacket motion [1] and subsequent vibronic relaxation processes [2] of organic molecules in solution. We have studied the ultrafast dynamics of dye molecules in temporally and spectrally resolved experiments on a 20 fs time scale. To separate the contributions from the ground and the excited states, a two-color scheme was employed. Blue pulses were used to excite a small fraction of the molecules to higher excited electronic states Sn (n >> 1) and the evolving dynamics was probed either with the red pulses tuned to the S0-S1 transition or directly with the blue pulses [3].