High-order-harmonic generation using gas-phase H2O molecules

Song-Feng Zhao, Cheng Jin, R. R. Lucchese, Anh-Thu Le, and C. D. Lin
Phys. Rev. A 83, 033409 – Published 14 March 2011

Abstract

We investigate high-order-harmonic generation of isotropically distributed gas-phase H2O molecules exposed to an intense laser field. The induced dipole of each individual molecule by the laser field is first calculated using the recently developed quantitative rescattering theory. In a thin medium, harmonic spectra generated coherently from all the molecules are then calculated by solving Maxwell’s equation of propagation. By using accurate transition dipoles of H2O, we show that the harmonics in the lower plateau region are quite different from models that employ the simpler strong-field approximation. We also examine the magnitude and phase of the harmonics and their dependence on laser focusing conditions.

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  • Received 18 January 2011

DOI:https://doi.org/10.1103/PhysRevA.83.033409

©2011 American Physical Society

Authors & Affiliations

Song-Feng Zhao1,2, Cheng Jin1, R. R. Lucchese3, Anh-Thu Le1, and C. D. Lin1

  • 1J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, 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
  • 3Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, USA

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Vol. 83, Iss. 3 — March 2011

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