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



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ID: 256677.0, MPI für Kernphysik / Theoretical Quantum Dynamics
Mechanisms of ultrahigh-order harmonic generation
Authors:Lein, Manfred
Language:English
Date of Publication (YYYY-MM-DD):2005-11
Title of Journal:Physical Review A
Journal Abbrev.:Phys. Rev. A
Volume:72
Issue / Number:5
Start Page:1
End Page:4
Sequence Number of Article:053816
Copyright:©2005 The American Physical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We analyze mechanisms of high-order harmonic generation from two-center molecules at large internuclear separations in linearly polarized laser fields. Since laser-driven electrons acquire instantaneous kinetic energies of up to 8 times the ponderomotive potential Up, recombination at an appropriately placed nucleus leads to ultrahigh-order harmonic emission [P. Moreno, L. Plaja, and L. Roso, Phys. Rev. A 55, R1593 (1997)]. By solving the time-dependent Schrödinger equation for model systems, we show that this mechanism is only efficient if the single-particle orbital of the electron is coherently delocalized over the two potential wells. This is realized in the ground state of a one-electron molecular ion. In a neutral molecule or in a molecular ion created by ionization of a neutral molecule at large internuclear distance, the coherence is destroyed by electron-electron correlation.
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:ISI:000233603400182 [ID No:1]
ISSN:1050-2947 [ID No:2]
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