Open AccessTiming the release of the correlated electrons in strong-field nonsequential double ionization by circularly polarized two-color laser fields
Author(s) -
Xiaomeng Ma,
Yueming Zhou,
Yinbo Chen,
Min Li,
Yang Li,
Qingbin Zhang,
Peixiang Lu
Publication year - 2019
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.27.001825
Subject(s) - electron , atomic physics , laser , ionization , physics , semiclassical physics , optics , field (mathematics) , ion , quantum mechanics , quantum , mathematics , pure mathematics
With the semiclassical ensemble model, we systematically investigate the correlated electron dynamics in strong-field nonsequential double ionization (NSDI) by the counter-rotating circularly polarized two-color (CPTC) laser pulses. Our results show that the angular distributions of the electrons in NSDI sensitively depend on the intensity ratio of the CPTC laser fields. At the small ratio, the electron pairs emit with a relative angle of about 120°, and this angle shifts to 40° as the ratio increases and finally it exhibits a wide range distribution as the intensity ratio further increases. Back analysis of the NSDI trajectories shows that this behavior results from the relative-intensity-dependence of the release time of the electron pairs in the CPTC laser fields. The release times of the electron pairs are directly mapped to the angular distribution. Our results indicate that the emission times of the correlated electrons in NSDI can be controlled with the CPTC laser fields.