Enhanced Harmonic Generation from M=1 aligned Ar+

Abstract

We investigate harmonic generation (HG) from ground-state Ar+ aligned with M=1 at a laser wavelength of 390-nm and intensity of 4x10(14) Wcm-2. Using time-dependent R-matrix theory, we find that an initial state with magnetic quantum number M=1 provides a 4-fold increase in harmonic yield over M=0. HG arises primarily from channels associated with the (3)Pe threshold of Ar2+, in contrast with M=0 for which channels associated with the excited, (1)De threshold dominate HG. Multichannel and multielectron interferences lead to a more marked suppression of HG for M=1 than M=0.

5 pages, 3 figures. Accepted by Phys. Rev. A

References in corpus (5)

• Bright Coherent Ultrahigh Harmonics in the keV X-Ray Regime from Mid-Infrared Femtosecond Lasers
• Bright quasi-phasematched soft x-ray harmonic radiation from Argon ions
• Interference between competing pathways in harmonic generation
• Atomic harmonic generation in time-dependent R-matrix theory
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Cited by in corpus (8)

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• Population trapping in bound states during IR-assisted ultra-fast photoionization of Ne${}^{+}$
• Multichannel Interference In High-Order Harmonic Generation From Ne(+) Driven By Ultrashort Intense Laser Pulse
• Electron dynamics in the carbon atom induced by spin-orbit interaction
• On the Cooper Minimum in Singly ionized and Neutral Argon