High-order-harmonic generation of Ar atoms in intense ultrashort laser fields: An all-electron time-dependent density-functional approach including macroscopic propagation effects
Journal
Physical Review A - Atomic, Molecular, and Optical Physics
Journal Volume
88
Journal Issue
5
Date Issued
2013
Author(s)
Li, P.-C.
Abstract
We present an ab initio approach for the study of macroscopic high-order-harmonic generation (HHG) of rare-gas atoms (Ar) in intense ultrashort laser fields. The single-atom response is calculated by means of the self-interaction-free time-dependent density-functional theoretical (TDDFT) approach with proper long-range potential, and the macroscopic propagation effects are taken into account by solving Maxwell's equations using the induced dipole moments of the single-atom multiple electron shell. We perform all-electron nonperturbative investigation of macroscopic HHG of rare-gas atoms with the emphasis on the role of multiple valence electron subshells. In particular, we found that the valence electron subshell features a destructive interference distribution in multiphoton resonant HHG. In addition, our results show the Cooper minimum in macroscopic HHG from Ar atoms is located at 53 eV, in good agreement with the experimentally measured minimum position.
SDGs
Type
journal article