Two-electron ionization in strong laser fields below intensity threshold: signatures of attosecond timing in correlated spectra

Details Two-electron ionization in strong laser fields below intensity threshold: signatures of attosecond timing in correlated spectra Two-electron ionization in strong laser fields below intensity threshold: signatures of attosecond timing in correlated spectra

2008-09-16

arxiv.org/abs/0809.2630v2

Phys. Rev. A 79, 023417 (2009)

Physics

Atomic Physics

25 pages and 4 figures

Scientific paper

10.1103/PhysRevA.79.023417

We develop an analytical model of correlated two-electron ionization in strong infrared laser fields. The model includes all relevant interactions between the electrons, the laser field, and the ionic core nonperturbatively. We focus on the deeply quantum regime, where the energy of the active electron driven by the laser field is insufficient to collisionally ionize the parent ion, and the assistance of the laser field is required to create a doubly charged ion. In this regime, the electron-electron and the electron-ion interactions leave distinct footprints in the correlated two-electron spectra, recording the mutual dynamics of the escaping electrons.

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