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MO: Fachverband Molekülphysik

MO 24: Poster: Femtosecond spectroscopy

MO 24.5: Poster

Thursday, March 17, 2011, 16:00–18:00, P2

Molecular dynamics probed via strong-field ionization of oriented molecules — •Sebastian Trippel, Lotte Holmegaard, Stephan Stern, and Jochen Küpper — Center for Free-Electron Laser Science, DESY, Notkestr. 85, 22607 Hamburg, Germany

We are setting up a new experiment to study ultrafast molecular dynamics directly in the molecular frame. Supersonic beams of cold, large and complex molecules will be quantum state selected and, successively, adiabatically oriented by a combination of static electric and strong picosecond laser fields [1, 2]. A second ultrashort laser pulse will initiate a rearrangement of the chemical structure of the molecules. The molecular-frame photoelectron angular distribution of the highest occupied molecular orbitals will be detected to study molecular dynamics during this rearrangement process [2]. The whole experiment will operate at 1 kHz repetition rate, which allows us to investigate weak processes.
L. Holmegaard, J. H. Nielsen, I. Nevo, H. Stapelfeldt, F. Filsinger, J. Küpper and G. Meijer, Phys. Rev. Lett., 102, 023001 (2009)
F. Filsinger et al., J. Chem. Phys. 131, 064309 (2009)
L. Holmegaard et al., Nature Physics, 6, 428 (2010)