Two-dimensional electron momentum spectra of argon ionized by short intense lasers: Comparison of theory with experiment

Journal Article · Thu Feb 15 04:00:00 EST 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.75.023407· OSTI ID:20982145

Morishita, Toru ^[1]; Chen, Zhangjin; Lin, C D ^[2]; Watanabe, Shinichi ^[1]

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1. Department of Applied Physics and Chemistry, University of Electro-Communications, 1-5-1 Chofu-ga-oka, Chofu-shi, Tokyo 182-8585 (Japan)
2. Department of Physics, Kansas State University, Manhattan, Kansas 66506 (United States)

We studied the two-dimensional electron momentum spectra of Ar by femtosecond intense laser pulses with mean wavelength from 400 nm to 800 nm, to compare with experimental results of Maharjan et al. [J. Phys. B 39, 1955 (2006)]. At the higher intensities we found that the effects of ground-state depletion and laser-focus volume are very important such that the peak laser field strength is not reached in experiment. The ubiquitous fanlike stripes in the low-energy electron momentum spectra and the evidence of Freeman resonances in the experimental data are well reproduced in the theoretical calculations. We emphasize that depletion of the initial state should be carefully evaluated for ionization of atoms in the tunneling region.

• OSTI ID: 20982145
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 75; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOMS
COMPARATIVE EVALUATIONS
ELECTRON SPECTRA
ELECTRONS
GROUND STATES
LASER RADIATION
PHOTOIONIZATION
PHOTON-ATOM COLLISIONS
PULSES
RESONANCE
TUNNEL EFFECT
TUNNELING
TWO-DIMENSIONAL CALCULATIONS
WAVELENGTHS