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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 9 — May. 5, 2014
  • pp: 10968–10974

Dissociative recombination in ultraviolet filamentary plasma gratings

Hui Zhou, Wenxue Li, Di Wang, Liping Shi, Liang’en Ding, and Heping Zeng  »View Author Affiliations

Optics Express, Vol. 22, Issue 9, pp. 10968-10974 (2014)

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We investigated collisions of nitrogen and argon gas mixture with energetic electrons accelerated by Bragg incident intense infrared femtosecond laser pulses in ultraviolet filamentary plasma gratings. Significant decrease of fluorescence spectra of argon atoms were observed when a small amount of nitrogen gas was mixed with argon gas that facilitated observable argon-nitrogen collisions. We experimentally measured the fluorescence emission from the argon and nitrogen gas mixture under different driving pulse energies, the fluorescence decay dynamics after the impact excitation, as well as the fluorescence intensity dependence on the nitrogen and argon pressures. The experimental measurements were based on the electron acceleration and its subsequent impact with the gas mixture in the filamentary plasma gratings, which was essential for the observation of the dominant dissociative recombination in the gas mixture.

© 2014 Optical Society of America

OCIS Codes
(140.3610) Lasers and laser optics : Lasers, ultraviolet
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
(320.7150) Ultrafast optics : Ultrafast spectroscopy
(020.2649) Atomic and molecular physics : Strong field laser physics

ToC Category:

Original Manuscript: January 21, 2014
Revised Manuscript: March 24, 2014
Manuscript Accepted: April 23, 2014
Published: April 30, 2014

Hui Zhou, Wenxue Li, Di Wang, Liping Shi, Liang’en Ding, and Heping Zeng, "Dissociative recombination in ultraviolet filamentary plasma gratings," Opt. Express 22, 10968-10974 (2014)

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