Heidelberg 2015 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 16: Posters 3: Novelties in Molecular Physics
MO 16.8: Poster
Mittwoch, 25. März 2015, 17:00–19:00, C/Foyer
Imaging ultrafast molecular dynamics by strong-field ionization — •Florian Bach, Felix Brauße, Faruk Krecinic, Arnaud Rouzee, and Marc Vrakking — Max-Born-Institut, Berlin, Germany
We investigated the vibrational wave packet dynamics in I2 molecules following excitation by a 550 nm, 50 fs, pump laser pulse. The molecular motion was mapped into the photoelectron and photoion momentum distributions resulting from strong-field ionization by a 1300 nm probe laser pulse. Both momentum distributions were recorded with a velocity map imaging spectrometer (VMIS). The kinetic energy distribution of the I+ fragments shows a clear signature of the vibrational wave packet motion induced by the pump laser pulse. We observe as well a modification of the angular distribution of the high kinetic energy photoelectrons that result from laser induced electron rescattering with the time delay between the two pulses that we assign to the change of the internuclear distance of the molecule.