Juan José Omiste1, Jens H. Nielsen2, Henrik Stapelfeldt3,4, Jochen Küpper5,6, Bretislav Friedrich7 , Rosario González-Férez1
1Instituto Carlos I de Física Teórica y Computacional and Departamento de Física Atómica, Molecular y Nuclear, Universidad de Granada, 18071 Granada, Spain
2Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark
3Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
4Interdisciplinary Nanoscience Center (iNANO), Aarhus University, 8000 Aarhus C, Denmark
5Center for Free-Electron Laser Science, DESY, 22607 Hamburg, Germany
6Department of Physics, University of Hamburg, 22761 Hamburg, Germany
7Fritz-Haber-Institut der Max-Planck-Gesellschaft, 14195 Berlin, Germany
We have experimentally and theoretically investigated the mixed-field orientation of rotational-state-selected OCS molecules and achieved strong degrees of alignment and orientation. The applied moderately intense nanosecond laser pulses are long enough to adiabatically align molecules. However, in combination with a weak dc electric field, the same laser pulses result in nonadiabatic dynamics of the mixed-field orientation. These observations are fully explained by calculations employing both adiabatic and nonadiabatic (time-dependent) models [1, 2].
 J. H. Nielsen et al., Phys. Rev. Lett. 108, 193001 (2012)
 J. J. Omiste and R. González-Férez, Phys. Rev. A 86, 043437 (2012)
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