High-order-harmonic generation using gas-phase H{sub 2}O molecules

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.033409· OSTI ID:21541315

Songfeng, Zhao ^[1]; Jin, Cheng; Le, Anh-Thu; Lin, C D ^[1]; Lucchese, R R ^[2]

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1. J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506 (United States)
2. Department of Chemistry, Texas A and M University, College Station, Texas 77843-3255 (United States)

We investigate high-order-harmonic generation of isotropically distributed gas-phase H{sub 2}O 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 H{sub 2}O, 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.

• OSTI ID: 21541315
• Journal Information: Physical Review. A, Vol. 83, Issue 3; Other Information: DOI: 10.1103/PhysRevA.83.033409; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
APPROXIMATIONS
DIPOLES
FOCUSING
HARMONIC GENERATION
HARMONICS
LASER RADIATION
MAXWELL EQUATIONS
MOLECULES
RESCATTERING
SPECTRA
WATER
CALCULATION METHODS
DIFFERENTIAL EQUATIONS
ELECTROMAGNETIC RADIATION
EQUATIONS
FREQUENCY MIXING
HYDROGEN COMPOUNDS
MULTIPOLES
OSCILLATIONS
OXYGEN COMPOUNDS
PARTIAL DIFFERENTIAL EQUATIONS
RADIATIONS
SCATTERING