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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 17 — Aug. 13, 2012
  • pp: 19580–19588

Correlated electron dynamics in nonsequential double ionization of molecules by mid-infrared fields

Qingbin Tang, Yueming Zhou, Cheng Huang, Qing Liao, and Peixiang Lu  »View Author Affiliations

Optics Express, Vol. 20, Issue 17, pp. 19580-19588 (2012)

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The electron dynamics in strong field nonsequential double ionization (NSDI) of nitrogen molecules by mid-infrared (MIR) laser pulses is investigated with the three-dimensional classical ensemble model. The numerical results show that in the MIR regime, the correlated behavior of the two electrons from NSDI is independent on the molecular alignment, contrary to the case in the near-infrared (NIR) regime where the electron correlations exhibit a strong alignment dependence. In consistent with the experimental results, our numerical results show that the longitudinal momentum spectrum of the doubly charged ion evolves from a wide single-hump structure at NIR regime into a double-hump structure when wavelength enters the MIR regime. This double-hump structure becomes more pronounced as the wavelength further increases. The responsible microscopic electron dynamics of NSDI at the MIR regime is explored by back analysis of the classical trajectories.

© 2012 OSA

OCIS Codes
(020.4180) Atomic and molecular physics : Multiphoton processes
(260.3230) Physical optics : Ionization
(270.6620) Quantum optics : Strong-field processes

ToC Category:
Atomic and Molecular Physics

Original Manuscript: June 29, 2012
Revised Manuscript: August 3, 2012
Manuscript Accepted: August 6, 2012
Published: August 10, 2012

Qingbin Tang, Yueming Zhou, Cheng Huang, Qing Liao, and Peixiang Lu, "Correlated electron dynamics in nonsequential double ionization of molecules by mid-infrared fields," Opt. Express 20, 19580-19588 (2012)

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