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.

Department(s)

Physics

Keywords and Phrases

Gasphase; Harmonic Spectrum; High-Order; Induced Dipoles; Intense Laser Field; Laser Fields; Laser Focusing; Maxwell's Equations; Plateau Region; Rescattering; Strong-Field Approximations; Transition Dipole, Harmonic Generation; Laser Theory; Maxwell Equations; Molecules, Harmonic Analysis

International Standard Serial Number (ISSN)

1050-2947

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2011 American Physical Society (APS), All rights reserved.

Included in

Physics Commons

Share

 
COinS