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Riedle, Eberhard ORCID: 0000-0002-2672-5718; Ashworth, Stephen; Hasche, T.; Woerner, M.; Elsaesser, T. (1996): Two color spectroscopy of the vibrational and vibronic dynamics of large molecules in solution, with 20 fs optical pulses. Femtochemistry: Ultrafast Chemical and Physical Processes In Molecular SystemS, September 4 - 8, 1995, Lausanne, Switzerland.
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The ultrafast dynamics of the dye molecule IR125 dissolved in ethylene glycol was studied. The sample was excited to high lying electronic states with frequency doubled Ti:sapphire radiation (30 fs duration; center wavelength 425 nm) and then probed with the fundamental (20 fs duration; centered at 850 nm) which overlapped with both the S-0-S-1 absorption and fluorescence bands. Three components were observed in the signals, bleaching coherent wave packet dynamics in the electronic ground state and a slower component due to relaxation to the S-1 state.