High-order harmonic cutoff extension of the O{sub 2} molecule due to ionization suppression

Journal Article · Sun Dec 01 00:00:00 EST 2002 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.66.061401· OSTI ID:20632391

Bing, Shan; Xiaomin, Tong; Zengxiu, Zhao; Zenghu, Chang; Lin, C D ^[1]

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1. J.R. Macdonald Laboratory and Physics Department, Kansas State University, Manhattan, Kansas 66506 (United States)

High-order harmonic generation has been observed experimentally from O{sub 2} molecules at the saturation ionization intensity. The harmonic cutoff extends far beyond the cutoff of Xe despite both have nearly equal ionization potentials. In contrast, the harmonic spectra for N{sub 2} and Ar, which have almost the same ionization potentials, are essentially close to each other. We show the extension of harmonic cutoff in O{sub 2} is a consequence of ionization suppression. Using a simple modified tunneling ionization model for molecules, we predict both the harmonic cutoff extension and the ionization suppression semiquantitatively.

• OSTI ID: 20632391
• Journal Information: Physical Review. A, Vol. 66, Issue 6; Other Information: DOI: 10.1103/PhysRevA.66.061401; (c) 2002 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ENERGY SPECTRA
HARMONIC GENERATION
INHIBITION
IONIZATION POTENTIAL
MOLECULES
NITROGEN
OXYGEN
PHOTOIONIZATION
TUNNEL EFFECT