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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 17 — Aug. 13, 2012
  • pp: 19449–19454

Time-evolution of electron density in plasma measured by high-order harmonic generation

Hua Yang, Peng Liu, Haihe Lu, Xiaochun Ge, Ruxin Li, and Zhizhan Xu  »View Author Affiliations

Optics Express, Vol. 20, Issue 17, pp. 19449-19454 (2012)

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We propose a new method of measuring the electron density in plasma by high-order harmonic generation (HHG) of intense two-color femtosecond (fs) laser. As the 800 nm fundamental beam is introduced after its second harmonic generation (SHG) beam, the recovery of HHG by the fundamental pulses at a delay of ~40 ps indicates the decay time of the generated plasma. The electron-ion recombination rate and electron density decay are revealed by fitting the harmonic emission to the model that accounts for depletion of neutral atoms, phase mismatch and re-absorption of HHG.

© 2012 OSA

OCIS Codes
(350.5400) Other areas of optics : Plasmas
(020.2649) Atomic and molecular physics : Strong field laser physics

ToC Category:
Atomic and Molecular Physics

Original Manuscript: June 26, 2012
Revised Manuscript: July 19, 2012
Manuscript Accepted: July 27, 2012
Published: August 9, 2012

Hua Yang, Peng Liu, Haihe Lu, Xiaochun Ge, Ruxin Li, and Zhizhan Xu, "Time-evolution of electron density in plasma measured by high-order harmonic generation," Opt. Express 20, 19449-19454 (2012)

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