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Updated: May 24, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Interference between competing pathways in atomic harmonic generation
A C Brown1, S Hutchinson, M A Lysaght
1Centre for Theoretical Atomic, Molecular and Optical Physics, Queen's University Belfast, Belfast, United Kingdom.
Abstract:
We investigate the influence of the autoionizing 3s3p(6)nℓ resonances on the fifth harmonic generated by 200-240 nm laser fields interacting with Ar. To determine the influence of a multielectron response we develop the capability within time-dependent R-matrix theory to determine the harmonic spectra generated. The fifth harmonic is affected by interference between the response of a 3s electron and the response of a 3p electron, as demonstrated by the asymmetric profiles in the harmonic yields as functions of wavelength.
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