title: Mechanism of delayed double ionization in a strong laser field.
abstract: When intense laser pulses release electrons nonsequentially, the time delay between the last recollision and the subsequent ionization may last longer than what is expected from a direct impact scenario [recollision excitation with subsequent ionization (RESI)]. We show that the resulting delayed ionization stems from the inner electron being promoted to a sticky region. We identify the mechanism that traps and releases the electron from this region. As a signature of this mechanism, we predict oscillations in the ratio of RESI to double ionization yields versus laser intensity.
authors.affiliation: Centre de Physique Théorique, CNRS-Aix-Marseille Université, Marseille, France.
authors.forename: F
authors.initials: F
authors.lastname: Mauger
authors.forename: A
authors.initials: A
authors.lastname: Kamor
authors.forename: C
authors.initials: C
authors.lastname: Chandre
authors.forename: T
authors.initials: T
authors.lastname: Uzer