Hannover 2003 – wissenschaftliches Programm
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MO: Molekülphysik
MO 14: Koh
ärente Dynamik
MO 14.3: Vortrag
Freitag, 28. März 2003, 12:00–12:15, B 302
Controlling molecular dissociation by optimizing vibrational ladder climbing — •Thomas Witte, Thomas Hornung, Lars Windhorn, Detlev Proch, Regina de Vivie-Riedle, Marcus Motzkus, and Karl Kompa — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching
To achieve large population transfer to high vibrational levels in a selected ground-state mode of a polyatomic molecule (Cr(CO)6), we apply chirped femtosecond mid-infrared laser pulses at 2000 cm−1 to optimize vibrational ladder climbing as an energy deposition mechanism, which in turn controls the outcome of a unimolecular dissociation process [1]. Its dependence on excitation parameters (frequency, intensity, chirp) is investigated and found to be in excellent agreement with a theoretical calculation. In particular, it is shown that optimizing vibrational ladder climbing allows for coherently controlled excitation even in a polyatomic molecule.
[1] T. Witte, T. Hornung, L. Windhorn, D. Proch, R. de Vivie-Riedle, M. Motzkus, K.L. Kompa, J. Chem. Phys., Feb 1, 2003.