Separation of Target Structure and Medium Propagation Effects in High-Harmonic Generation

Details Separation of Target Structure and Medium Propagation Effects in High-Harmonic Generation Separation of Target Structure and Medium Propagation Effects in High-Harmonic Generation

2010-12-08

arxiv.org/abs/1012.1892v1

J. Phys. B: At. Mol. Opt. Phys. 44, 095601 (2011)/

Physics

Atomic Physics

Scientific paper

10.1088/0953-4075/44/9/095601

We calculate high-harmonic generation (HHG) by intense infrared lasers in atoms and molecules with the inclusion of macroscopic propagation of the harmonics in the gas medium. We show that the observed experimental spectra can be accurately reproduced theoretically despite that HHG spectra are sensitive to the experimental conditions. We further demonstrate that the simulated (or experimental) HHG spectra can be factored out as a product of a \macroscopic wave packet" and the photo-recombination transition dipole moment where the former depends on the laser properties and the experimental conditions, while the latter is the property of the target only. The factorization makes it possible to extract target structure from experimental HHG spectra, and for ultrafast dynamic imaging of transient molecules.

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