Influence of gas pressure on high-order-harmonic generation of Ar and Ne

Guoli Wang, Cheng Jin, Anh-Thu Le, and C. D. Lin
Phys. Rev. A 84, 053404 – Published 7 November 2011

Abstract

We study the effect of gas pressure on the generation of high-order harmonics where harmonics due to individual atoms are calculated using the recently developed quantitative rescattering theory, and the propagation of the laser and harmonics in the medium is calculated by solving the Maxwell's wave equation. We illustrate that the simulated spectra are very sensitive to the laser focusing conditions at high laser intensity and high pressure since the fundamental laser field is severely reshaped during the propagation. By comparing the simulated results with several experiments we show that the pressure dependence can be qualitatively explained. The lack of quantitative agreement is tentatively attributed to the failure of the complete knowledge of the experimental conditions.

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  • Received 29 July 2011

DOI:https://doi.org/10.1103/PhysRevA.84.053404

©2011 American Physical Society

Authors & Affiliations

Guoli Wang1,2, Cheng Jin1, Anh-Thu Le1, and C. D. Lin1

  • 1Physics Department, J. R. Macdonald Laboratory, Kansas State University, Manhattan, Kansas 66506-2604, USA
  • 2Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou,730070, China

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Vol. 84, Iss. 5 — November 2011

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