Dependence of the correlated-momentum patterns in double ionization on the carrier-envelope phase and intensity of a few-cycle laser pulse

Journal Article · Tue Dec 14 23:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.063423· OSTI ID:21528923

Xin, G G ^[1]; Ye, D F ^[2]; Liu, J ^[1]

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1. Key Laboratory of Cluster Science and Department of Physics, School of Science, Beijing Institute of Technology, Beijing 100081 (China)
2. Science and Technology Computation Physics Laboratory, Beijing Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)

In the present paper, we investigate the correlated electron emission of atoms irradiated by a few-cycle laser pulse, with emphasis on the correlated longitudinal momentum spectra. We find that the spectra show clear v-shaped structures, in analogy to what was observed recently in long-pulse experiments. Moreover, the patterns of the spectra depend sensitively on the carrier-envelope phase as well as the laser intensity. The v-shaped structure is more pronounced at lower and higher intensities and becomes obscure at medium intensity. At a lower intensity, upon change of the phase from 0 to {pi}/2, the v-shaped structure shifts from the first quadrant to the third quadrant and the ratios between the double ionization yields in the first and third quadrants are found to increase by a few orders of magnitude. The semiclassical rescattering model is exploited in the preceding calculations and the underlying mechanisms are uncovered by analyzing the subcycle dynamics of classical trajectories.

• OSTI ID: 21528923
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
APPROXIMATIONS
ATOMS
CALCULATION METHODS
CARRIERS
CORRELATIONS
ELECTROMAGNETIC RADIATION
ELECTRON CORRELATION
ELECTRON EMISSION
EMISSION
IONIZATION
LASER RADIATION
LINEAR MOMENTUM
LONGITUDINAL MOMENTUM
PULSES
RADIATIONS
RESCATTERING
SCATTERING
SEMICLASSICAL APPROXIMATION
SPECTRA
YIELDS