XUV-initiated high harmonic generation: driving inner valence electrons using below-threshold-energy XUV light

Abstract

We propose a novel scheme for resolving the contribution of inner- and outer-valence electrons in XUV-initiated high-harmonic generation in neon. By probing the atom with a low energy (below the 2s ionisation threshold) ultrashort XUV pulse, the 2p electron is steered away from the core, while the 2s electron is enabled to describe recollision trajectories. By selectively suppressing the 2p recollision trajectories we can resolve the contribution of the 2s electron to the high-harmonic spectrum. We apply the classical trajectory model to account for the contribution of the 2s electron, which allows for an intuitive understanding of the process.

arXiv comment5 pages, 4 figures

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• Time-resolved four-wave-mixing spectroscopy for inner-valence transitions
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• High-order harmonic generation enhanced by XUV light
• Population trapping in bound states during IR-assisted ultra-fast photoionization of Ne${}^{+}$
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Cited by in corpus (7)

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• Modeling tomographic measurements of photoelectron vortices in counter-rotating circularly polarized laser pulses
• Electron rotational asymmetry in strong-field photodetachment from F${}^{-}$ by circularly polarized laser pulses
• Extreme-ultraviolet-initiated High-harmonic Generation in Ar${}^{+}$
• On the Cooper Minimum in Singly ionized and Neutral Argon
• Ellipticity Dependence of Excitation and Ionization of Argon Atoms by Short-Pulse Infrared Radiation