Rostock 2019 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 9: Molecules in Intense Laser Fields
MO 9.1: Vortrag
Montag, 11. März 2019, 16:15–16:30, S HS 002 Biologie
Imaging experiments in the molecular frame — •Evangelos T. Karamatskos1,2,3, Sebastian Raabe4, Terry Mullins1, Andrea Trabattoni1, Philipp Stammer4, Gildas Goldsztejn4, Rasmus R. Johansen5, Karol Dlugolecki1, Henrik Stapelfeldt5, Marc J.J. Vrakking4, Sebastian Trippel1,3, Arnaud Rouzée4, and Jochen Küpper1,2,3 — 1CFEL, DESY, Hamburg, Germany — 2Departments of Physics and Chemistry, Universität Hamburg, Germany — 3CUI, Universität Hamburg, Germany — 4Max-Born Institute, Berlin, Germany — 5Department of Chemistry, Aarhus University, Denmark
Imaging the ultrafast dynamics of molecules requires experimental methods, that offer atomic spatial and (sub-)femtosecond temporal resolution. The possibility to prepare cold, controlled molecular samples in the gas phase, combined with elaborate methods to fix the molecules in space, are important prerequisites to image molecular dynamics directly in the molecule-fixed frame. We present results on strong field-free alignment, achieved for the linear carbonyl sulfide (OCS) molecule and the complex, asymmetric top rotor indole. Furthermore, employing the laser-induced electron diffraction (LIED) method, the molecular structure of OCS could be retrieved with atomic resolution. Molecular-frame angularly-resolved photoelectron spectra show clear signatures of strong field photoelectron holography, which differ, depending on the orientation of the molecules with respect to the laser polarization of the ionizing field. A discussion of the observed interference patterns will be presented. References: Karamatskos et al., arXiv:1807.01034