Nonsequential double ionization with few-cycle laser pulses

Details Nonsequential double ionization with few-cycle laser pulses Nonsequential double ionization with few-cycle laser pulses

2003-10-23

arxiv.org/abs/physics/0310120v2

Phys. Rev. Lett. 92, 133006 (2004)

Physics

Atomic Physics

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

Scientific paper

10.1103/PhysRevLett.92.133006

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.

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