Harmonic generation by noble-gas atoms in the near-IR regime using ab initio time-dependent R-matrix theory

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Abstract

We demonstrate the capability of ab initio time-dependent R-matrix theory to obtain accurate harmonic generation spectra of noble-gas atoms at near-IR wavelengths between 1200 and 1800 nm and peak intensities up to 1.8 × 10^(14) W/cm^(2). To accommodate the excursion length of the ejected electron, we use an angular-momentum expansion up to Lmax=279. The harmonic spectra show evidence of atomic structure through the presence of a Cooper minimum in harmonic generation for Kr, and of multielectron interaction through the giant resonance for Xe. The theoretical spectra agree well with those obtained experimentally.
Original languageEnglish
Pages (from-to)043418
Number of pages5
JournalPhysical Review A (Atomic, Molecular, and Optical Physics)
Volume90
Issue number4
DOIs
Publication statusPublished - 29 Oct 2014

Keywords

  • Harmonic generation
  • ultrafast physics
  • computataional physics

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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