Electron dynamics of molecular double ionization by circularly polarized laser pulses

Journal Article · Wed Aug 21 04:00:00 EDT 2013 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.4818592· OSTI ID:22220480

Tong, Aihong ^[1]; Zhou, Yueming; Huang, Cheng; Lu, Peixiang ^[1]

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1. School of Physics and Key Laboratory of Fundamental Physical Quantities Measurement of Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074 (China)

Using the classical ensemble method, we have investigated double ionization (DI) of diatomic molecules driven by circularly polarized laser pulses with different internuclear distances (R). The results show that the DI mechanism changes from sequential double ionization (SDI) to nonsequential double ionization (NSDI) as the internuclear distance increases. In SDI range, the structure of the electron momentum distribution changes seriously as R increases, which indicates the sensitive dependence of the release times of the two electrons on R. For NSDI, because of the circular polarization, the ionization of the second electron is not through the well-known recollision process but through a process where the first electron ionizes over the inner potential barrier of the molecule, moves directly towards the other nucleus, and kicks out the second electron.

• OSTI ID: 22220480
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 7 Vol. 139; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
74 ATOMIC AND MOLECULAR PHYSICS
ELECTRONS
EXCITED STATES
LASERS
PHOTOIONIZATION
PHOTON-MOLECULE COLLISIONS
POLARIZATION
PULSES