Strong-field ionization of polar molecules: Stark-shift-corrected strong-field approximation

Journal Article · Sun Nov 14 23:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.053404· OSTI ID:21528664

Dimitrovski, D; Martiny, C P. J.; Madsen, L B ^[1]

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1. 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, Journal Name: Physical Review. A Journal Issue: 5 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
APPROXIMATIONS
CALCULATION METHODS
CARBONYLS
CHALCOGENIDES
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
IONIZATION
LASER RADIATION
LEPTONS
MOLECULAR ORBITAL METHOD
MOLECULES
POLARIZATION
PULSES
RADIATIONS
STARK EFFECT
SULFIDES
SULFUR COMPOUNDS
TUNNEL EFFECT