We observe high-order harmonic spectra generated from a thin atomic medium, Ar, Kr, and Xe, by intense 800-nm and 1300-nm femtosecond pulses. A clear signature of a single-atom response is observed in the harmonic spectra. Especially in the case of Ar, a Cooper minimum, reflecting the electronic structure of the atom, is observed in the harmonic spectra. We successfully extract the photorecombination cross sections of the atoms in the field-free condition with the help of an accurate recolliding electron wave packet. The present protocol paves the way for exploring ultrafast imaging of molecular dynamics with attosecond resolution.
S. Minemoto et al., "Retrieving Photorecombination Cross Sections of Atoms from High-Order Harmonic Spectra," Physical Review A - Atomic, Molecular, and Optical Physics, vol. 78, no. 6, American Physical Society (APS), Dec 2008.
The definitive version is available at https://doi.org/10.1103/PhysRevA.78.061402
Keywords and Phrases
Atomic Physics; Atoms; Dynamics; Electromagnetic Pulse; Electronic Structure; Harmonic Analysis; Krypton; Molecular Dynamics; Quantum Chemistry; Ultrashort Pulses; Xenon, Atomic Mediums; Attosecond Resolutions; Cooper Minimums; Cross Sections; Electron Wave Packets; Femtosecond Pulses; Photorecombination; Ultrafast Imaging, Atomic Spectroscopy
International Standard Serial Number (ISSN)
Article - Journal
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