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Dressed-bound-state molecular strong-field approximation: application to high-order harmonic generation by heteronuclear diatomic molecules |
JOSA B, Vol. 29, Issue 8, pp. 2147-2155 (2012)
http://dx.doi.org/10.1364/JOSAB.29.002147
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Abstract
A theory of high-order harmonic generation by heteronuclear diatomic molecules exposed to an elliptically polarized laser field is presented. This theory is based on the molecular strong-field approximation, which takes into account the dressing of the initial and final molecular bound states caused by the laser field. The laser-field-caused Stark shift of the effective ionization potential of the highest occupied molecular orbital changes the structure of the harmonic spectra. Both the even and odd harmonics appear in the harmonic spectra due to the broken inversion symmetry of the heteronuclear diatomic molecule. An interference minima condition that is valid for arbitrary heteronuclear diatomic molecules is derived. Our results are illustrated using examples of CO and NO molecules.
© 2012 Optical Society of America
OCIS Codes
(020.4180) Atomic and molecular physics : Multiphoton processes
(190.4160) Nonlinear optics : Multiharmonic generation
(190.4180) Nonlinear optics : Multiphoton processes
(270.4180) Quantum optics : Multiphoton processes
(270.6620) Quantum optics : Strong-field processes
(020.2649) Atomic and molecular physics : Strong field laser physics
ToC Category:
Atomic and Molecular Physics
History
Original Manuscript: April 18, 2012
Revised Manuscript: June 30, 2012
Manuscript Accepted: June 30, 2012
Published: July 27, 2012
Citation
Senad Odžak and Dejan B. Milošević, "Dressed-bound-state molecular strong-field approximation: application to high-order harmonic generation by heteronuclear diatomic molecules," J. Opt. Soc. Am. B 29, 2147-2155 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-8-2147
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