Enhanced harmonic generation from Ar+ aligned with M =1

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We investigate harmonic generation (HG) from ground-state Ar+ aligned with M=1 at a laser wavelength of 390 nm and intensity of 4×1014Wcm−2. Using time-dependent R-matrix theory, we find that an initial state with magnetic quantum number M=1 provides a fourfold increase in harmonic yield over M=0. HG arises primarily from channels associated with the 3Pe threshold of Ar2+, in contrast with M=0 for which channels associated with the excited, 1De threshold dominate HG. Multichannel and multielectron interferences lead to a more marked suppression of HG for M=1 than M=0.
Original languageEnglish
Article number033419
JournalPhysical Review A (Atomic, Molecular, and Optical Physics)
Issue number3
Publication statusPublished - 23 Sept 2013

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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