Mechanism of Delayed Double Ionization in a Strong Laser Field

posted May 13, 2016, 11:16 PM by François Mauger   [ updated May 13, 2016, 11:20 PM ]

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.

Reference

F. Mauger, A. Kamor, C. Chandre, and T. Uzer – Mechanism of Delayed Double Ionization in a Strong Laser Field - Physical Review Letters 108, 063001 (2012)