Schedule Mar 15, 2013
Nonadiabatic Effects in Long-pulse Mixed-field Orientation
Rosario González-Férez (Univ. Granada)

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]. 

[1] J. H. Nielsen et al., Phys. Rev. Lett. 108, 193001 (2012)

[2] J. J. Omiste and R. González-Férez, Phys. Rev. A 86, 043437 (2012)

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