Nonsequential double ionization with few-cycle laser pulses

Abstract

We investigate differential electron distributions in nonsequential double ionization (NSDI) with linearly polarized, few-cycle pulses, using a classical model based on a laser-assisted inelastic $(e^{-},2e^{-})$ rescattering mechanism. We show that these yields, as functions of the momentum components parallel to the laser polarization, are highly asymmetric, and strongly influenced by the absolute phase, i.e., the phase difference between the carrier oscillation of a few-cycle laser pulse and its envelope. Indeed, around a critical phase, such distributions change their sign in a radical fashion. This phase dependence provides a possibility for absoute-phase measurements which is, in principle, superior to the schemes involving high-order harmonic generation or above-threshold ionization.

1 revtex file, 4 eps files (text and Fig. 1 have been changed; Fig. 1 has been compressed due to memory problems)

References in corpus (2)

• Classical collisional trajectories as the source of strong-field double ionization of helium in the knee regime
• Correlated electron emission in laser-induced nonsequence double ionization of Helium

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