Open AccessHigh-order above-threshold ionization with few-cycle pulse: a meter of the absolute phase
Author(s) -
D. B. Milošević,
Gerhard G. Paulus,
W. Becker
Publication year - 2003
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.11.001418
Subject(s) - above threshold ionization , carrier envelope phase , spectral line , optics , laser , ionization , atomic physics , physics , phase (matter) , polarization (electrochemistry) , absolute scale , pulse (music) , photoionization , chemistry , ion , quantum mechanics , astronomy , detector
Angle-resolved energy spectra of high-order above-threshold ionization are calculated in the direction of the laser polarization for a linearly polarized four-cycle laser pulse (two cycles FWHM) as a function of the carrier-envelope relative phase (absolute phase). The spectra exhibit a characteristic left-right (backward-forward) asymmetry, which should allow one to determine the value of the absolute phase in a given experiment by comparison with the theoretical spectra. A classical analysis of the spectra calculated is presented. High-energy electron emission is found to occur in one or two ultrashort (< inverted exclamation mark<< 0.7 fs) bursts. In the latter case, the spectra display a peak structure whose analysis reveals a time-domain image of electron emission.