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.
|Number of pages||5|
|Journal||Physical Review A (Atomic, Molecular, and Optical Physics)|
|Publication status||Published - 29 Oct 2014|
- Harmonic generation
- ultrafast physics
- computataional physics
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
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- School of Mathematics and Physics - Research Software Engineer
- Centre for Theoretical Atomic, Molecular and Optical Physics (CTAMOP)