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          Institute: MPI für Kernphysik     Collection: Theoretical Quantum Dynamics     Display Documents



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ID: 285690.0, MPI für Kernphysik / Theoretical Quantum Dynamics
Strong-field approximation for harmonic generation in diatomic molecules
Authors:Chirila, Ciprian C.; Lein, Manfred
Language:English
Date of Publication (YYYY-MM-DD):2006-02-14
Title of Journal:Physical Review A
Journal Abbrev.:Phys. Rev. A
Volume:73
Sequence Number of Article:023410
Copyright:©2006 The American Physical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The generation of high-order harmonics in diatomic molecules is investigated within the framework of the strong-field approximation. We show that the conventional saddle-point approximation is not suitable for large internuclear distances. An adapted saddle-point method that takes into account the molecular structure is presented. We analyze the predictions for the harmonic-generation spectra in both the velocity and length gauges. At large internuclear separations, we compare the resulting cutoffs with the predictions of the three-step semiclassical mechanism. Good agreement is obtained only by using the adapted saddle-point method combined with the velocity gauge.
External Publication Status:published
Document Type:Article
Communicated by:C.H. Keitel
Affiliations:MPI für Kernphysik/ Group C.H. Keitel/Molecular Quantum Dynamics and Attosecond Physics (M. Lein)
Identifiers:DOI:10.1103/PhysRevA.73.023410
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