Enhanced harmonic generation from Ar+ aligned with M =1

Andrew C. Brown; Hugo W. Van Der Hart

doi:10.1103/PhysRevA.88.033419

Enhanced harmonic generation from Ar+ aligned with M =1

Andrew C. Brown, Hugo W. Van Der Hart

School of Mathematics and Physics

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Abstract

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 language	English
Article number	033419
Journal	Physical Review A (Atomic, Molecular, and Optical Physics)
Volume	88
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevA.88.033419
Publication status	Published - 23 Sept 2013

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1103/PhysRevA.88.033419

Enhanced harmonic generation from Ar+ aligned with M = 1
©2013 American Physical Society.
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title = "Enhanced harmonic generation from Ar+ aligned with M =1",

abstract = "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.",

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Enhanced harmonic generation from Ar+ aligned with M =1

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