Open AccessQuantitative identification of different strong-field ionization channels in the transition regime
Author(s) -
Xiaolei Hao,
Zheng Shu,
Weidong Li,
Shiqiang Hu,
Jing Chen
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.025250
Subject(s) - ionization , physics , adiabatic process , field (mathematics) , schrödinger equation , quantum tunnelling , impact ionization , photon , atomic physics , statistical physics , quantum mechanics , mathematics , ion , pure mathematics
We make a quantitative investigation on the tunneling and multi-photon channels in the transition regime from Keldysh parameter γ < 1 to γ > 1 by numerically solving the time-dependent Schrödinger equation (TDSE). A method is proposed to separate the contributions of those ionization channels based on the characteristics of the current. By analysing the dependence of the ionization rate on the Keldysh parameter γ, we identify a field independent transition point at γ ≈ 2, which is different from the well-accepted consensus of γ ≈ 1, from adiabatic to nonadiabatic regime.