Strong-field ionization of polar molecules: Stark-shift-corrected strong-field approximation
- Lundbeck Foundation Theoretical Center for Quantum System Research, Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C (Denmark)
We extend the molecular strong-field approximation for ionization, in the tunneling limit, to include systematically the linear and quadratic static Stark shifts of the ionizing molecular orbital. This approach, simple to implement, is capable of describing the essential physics of the process of strong-field ionization of oriented polar molecules by circularly polarized laser pulses. The modification of the molecular orbitals in strong fields is also discussed and in cases of extreme polarization of inner electrons a simple model is devised. We find very good agreement between the results from our model and those obtained in the recent experiment on ionizaton of oriented carbonyl sulphide and benzonitrile molecules [L. Holmegaard et al., Nature Phys. 6, 428 (2010)].
- OSTI ID:
- 21528664
- Journal Information:
- Physical Review. A, Vol. 82, Issue 5; Other Information: DOI: 10.1103/PhysRevA.82.053404; (c) 2010 The American Physical Society; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
APPROXIMATIONS
CARBONYLS
ELECTRONS
IONIZATION
LASER RADIATION
MOLECULAR ORBITAL METHOD
MOLECULES
POLARIZATION
PULSES
STARK EFFECT
SULFIDES
TUNNEL EFFECT
CALCULATION METHODS
CHALCOGENIDES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FERMIONS
LEPTONS
RADIATIONS
SULFUR COMPOUNDS