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. © 2012 American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Mauger, F., Kamor, A., Chandre, C., & Uzer, T. (2012). Mechanism of delayed double ionization in a strong laser field. Physical Review Letters, 108 (6) https://doi.org/10.1103/PhysRevLett.108.063001