Physics – Chemical Physics
Scientific paper
2011-06-08
Physics
Chemical Physics
17 pages, 11 figures
Scientific paper
We examine the impact of the combination of a static electric field and a non resonant linearly polarized laser field on an asymmetric top molecule. Within the rigid rotor approximation, we analyze the symmetries of the Hamiltonian for all possible field configurations. For each irreducible representation, the Schr\"odinger equation is solved by a basis set expansion in terms of a linear combination of Wigner functions respecting the corresponding symmetries, which allows us to distinguish avoided crossings from genuine ones. Using the fluorobenzene and pyridazine molecules as prototypes, the rotational spectra and properties are analyzed for experimentally accessible static field strengths and laser intensities. Results for energy shifts, orientation, alignment and hybridization of the angular motion are presented as the field parameters are varied. We demonstrate that a proper selection of the fields gives rise to a constrained rotational motion in the three Euler angles, the wave function being oriented along the electrostatic field direction, and aligned in the other two angles.
González-Férez Rosario
Omiste Juan J.
Schmelcher Peter
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