We report theoretical calculations of the effect of the multiple-orbital contribution in high-order harmonic generation (HHG) of aligned CO₂ with the inclusion of macroscopic propagation of harmonic fields in the medium. Our results show very good agreement with recent experiments for the dynamics of the minimum in HHG spectra as laser intensity or alignment angle changes. Calculations are carried out to check how the position of the minimum in HHG spectra depends on the degrees of molecular alignment, laser-focusing conditions, and the effects of alignment-dependent ionization rates of the different molecular orbitals. These analyses help to explain why the minima observed in different experiments may vary.
C. Jin et al., "Analysis of Effects of Macroscopic Propagation and Multiple Molecular Orbitals on the Minimum in High-Order Harmonic Generation of Aligned CO₂," Physical Review A - Atomic, Molecular, and Optical Physics, vol. 83, no. 5, American Physical Society (APS), May 2011.
The definitive version is available at https://doi.org/10.1103/PhysRevA.83.053409
Keywords and Phrases
Alignment Angle; Harmonic Field; High Order Harmonic Generation; Ionization Rates; Laser Intensities; Theoretical Calculations, Alignment; Chemical Bonds; Experiments; Harmonic Analysis; Harmonic Generation; Molecular Modeling; Molecular Orbitals, Carbon Dioxide
International Standard Serial Number (ISSN)
Article - Journal
© 2011 American Physical Society (APS), All rights reserved.