Influence of molecular symmetry on strong-field ionization: Studies on ethylene, benzene, fluorobenzene, and chlorofluorobenzene

Using the molecular strong-field approximation we consider the effects of molecular symmetry on the ionization of molecules by a strong, linearly polarized laser pulse. Electron angular distributions and total ionization yields are calculated as a function of the relative orientation between the mol...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2005-01, Vol.71 (1), Article 013418
Main Authors: Kjeldsen, Thomas K., Bisgaard, Christer Z., Madsen, Lars Bojer, Stapelfeldt, Henrik
Format: Article
Language:English
Subjects:
ANGULAR DISTRIBUTION
ATOMIC AND MOLECULAR PHYSICS
BENZENE
ELECTRONS
ETHYLENE
IONIZATION
LASER RADIATION
MOLECULES
NONLINEAR PROBLEMS
ORIENTATION
POLARIZATION
PULSES
SYMMETRY
TUNNEL EFFECT
YIELDS
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Summary:Using the molecular strong-field approximation we consider the effects of molecular symmetry on the ionization of molecules by a strong, linearly polarized laser pulse. Electron angular distributions and total ionization yields are calculated as a function of the relative orientation between the molecule and the laser polarization. Our studies focus on ethylene (C{sub 2}H{sub 4}), benzene (C{sub 6}H{sub 6}), fluorobenzene (C{sub 6}H{sub 5}F), and ortho chlorofluorobenzene (1,2 C{sub 6}H{sub 4}ClF), the molecules representing four different point groups. The results are compared with experiments, when available, and with the molecular tunneling theory appropriately extended to nonlinear polyatomic molecules. Our investigations show that the orientational dependence of ionization yields is primarily determined by the nodal surface structure of the molecular orbitals.
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.71.013418