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Electron angular correlation in nonsequential double ionization of molecules by counter-rotating two-color circularly polarized fields
Author(s) -
Zhenhao Chen,
Jennifer Su,
Xue Zhang,
Xuefei Huang,
Yingbin Li,
Cheng Huang
Publication year - 2021
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.439864
Subject(s) - double ionization , physics , atomic physics , electron , angular momentum , ionization , ion , electronic correlation , elliptical polarization , optics , linear polarization , quantum mechanics , laser
Electron correlation in nonsequential double ionization (NSDI) of molecules by counter-rotating two-color circularly polarized (TCCP) fields is investigated with a three-dimensional classical ensemble model. Numerical results indicate that the two electrons from NSDI of molecules in counter-rotating TCCP fields show strong angular correlation and the angular correlation behavior sensitively depends on the internuclear distance. With the internuclear distance increasing, the dominant behavior of electron pairs evolves from correlation to anti-correlation. It leaves a clear imprint on the ion momentum distributions, which exhibit an inverted Y-shape distribution at a small internuclear distance and a triangle-shape distribution at a large internuclear distance. Back analysis indicates that the asymmetric electron energy sharing by soft recollision and longer time delay of double ionization are responsible for more anti-correlated emissions at large internuclear distances.

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