Open AccessNonsequential double ionization of alkaline-earth metal atoms by intense mid-infrared femtosecond pulses
Author(s) -
Hui Peng Kang,
Shi Chen,
Wei Chu,
Jinping Yao,
Jing Chen,
Xiao Jun Liu,
Ya Cheng,
Zhuo Xu
Publication year - 2020
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.397488
Subject(s) - alkaline earth metal , double ionization , ionization , femtosecond , atomic physics , infrared , excited state , ion , metal , physics , materials science , laser , optics , quantum mechanics , metallurgy
A systematic study of nonsequential double ionization (NSDI) of alkaline-earth metal atoms with mid-infrared femtosecond pulses is reported. We find that the measured NSDI yield shows a strong target dependence and it is more suppressed for alkaline-earth metal with higher ionization potential. The observation is attributed to the differences in the recollision induced excitation and ionization cross sections of alkaline-earth metals. This work indicates that NSDI of alkaline-earth metals can be generally understood within recollision picture and sheds light on ultrafast control of electron correlation and dynamics of ionic excited states during NSDI of atoms with complex structures.