Hannover 2016 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 19: Posters 4: Novelties in Molecular Physics: Femtosecond Spectroscopy, Molecular Clusters, Cold Molecules and Helium Droplets
MO 19.23: Poster
Donnerstag, 3. März 2016, 16:30–19:00, Empore Lichthof
Mixed-field orientation of molecules without rotational symmetry: time-dependent analysis — •Linda V. Thesing1, Rosario González-Férez2, and Jochen Küpper1,3,4 — 1Center for Free-Electron Laser Science, DESY — 2Instituto Carlos I, Universidad de Granada — 3The Hamburg Center for Ultrafast Imaging, University of Hamburg — 4Department of Physics, University of Hamburg
We theoretically investigate the rotational dynamics of molecules without rotational symmetry in combined non-resonant laser fields and static electric fields. It was experimentally demonstrated that asymmetric top molecules with a permanent dipole moment non parallel to any principal axis of polarizability can be 3D aligned and orientated using elliptically polarized laser pulses in combination with weak dc electric fields [1]. A theoretical analysis assuming adiabatic behavior was not able to explain these findings accurately [1]. Here, we solve the time-dependent Schrödinger equation for different field configurations for 6-chloropyridazine-3-carbonitrile (CPC) as an example molecule in order to study the influence of nonadiabatic phenomena that have previously been shown to play an important role for mixed field orientation dynamics [2].
[1] Hansen et al., J. Chem. Phys. 139, 234313 (2013)
[2] Nielsen et al., Phys. Rev. Lett. 108, 193001 (2012)