High-order harmonic spectroscopy in an ionized high-density target

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  • Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy im Forschungsbund Berlin e.V. (MBI)
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Original languageEnglish
Article number836287
JournalFrontiers in Physics
Volume10
Publication statusPublished - 1 Nov 2022

Abstract

We use high-order harmonic spectroscopy to study ionization dynamics in a macroscopic target with tunable density, spanning over six orders of magnitude. In an in situ pump-probe experiment, the target is prepared at different densities with varying degrees of laser-induced ionization. High-order harmonic radiation is generated in the pre-ionized target, and a steepening in the decrease of the harmonic yield is observed for increasing pre-ionization, allowing not only to identify the contributing quantum paths during high-order harmonic generation but also in determining the amount of ionization within the target. The measurements allow probing of ionization dynamics in laser-induced plasma with high spatio-temporal resolution and are specifically of interest for the optimization of the harmonic generation process in high-density targets with number densities of up to 1022 cm−3.

Keywords

    droplets, high-density target, high-order harmonic generation, ionization, pump-probe, spectroscopy, water

ASJC Scopus subject areas

Cite this

High-order harmonic spectroscopy in an ionized high-density target. / Kurz, Heiko G.; Kretschmar, Martin; Binhammer, Thomas et al.
In: Frontiers in Physics, Vol. 10, 836287, 01.11.2022.

Research output: Contribution to journalArticleResearchpeer review

Kurz, HG, Kretschmar, M, Binhammer, T, Nagy, T, Ristau, D, Lein, M, Morgner, U & Kovačev, M 2022, 'High-order harmonic spectroscopy in an ionized high-density target', Frontiers in Physics, vol. 10, 836287. https://doi.org/10.3389/fphy.2022.836287
Kurz, H. G., Kretschmar, M., Binhammer, T., Nagy, T., Ristau, D., Lein, M., Morgner, U., & Kovačev, M. (2022). High-order harmonic spectroscopy in an ionized high-density target. Frontiers in Physics, 10, Article 836287. https://doi.org/10.3389/fphy.2022.836287
Kurz HG, Kretschmar M, Binhammer T, Nagy T, Ristau D, Lein M et al. High-order harmonic spectroscopy in an ionized high-density target. Frontiers in Physics. 2022 Nov 1;10:836287. doi: 10.3389/fphy.2022.836287
Kurz, Heiko G. ; Kretschmar, Martin ; Binhammer, Thomas et al. / High-order harmonic spectroscopy in an ionized high-density target. In: Frontiers in Physics. 2022 ; Vol. 10.
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abstract = "We use high-order harmonic spectroscopy to study ionization dynamics in a macroscopic target with tunable density, spanning over six orders of magnitude. In an in situ pump-probe experiment, the target is prepared at different densities with varying degrees of laser-induced ionization. High-order harmonic radiation is generated in the pre-ionized target, and a steepening in the decrease of the harmonic yield is observed for increasing pre-ionization, allowing not only to identify the contributing quantum paths during high-order harmonic generation but also in determining the amount of ionization within the target. The measurements allow probing of ionization dynamics in laser-induced plasma with high spatio-temporal resolution and are specifically of interest for the optimization of the harmonic generation process in high-density targets with number densities of up to 1022 cm−3.",
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AU - Kretschmar, Martin

AU - Binhammer, Thomas

AU - Nagy, Tamas

AU - Ristau, Detlev

AU - Lein, Manfred

AU - Morgner, Uwe

AU - Kovačev, Milutin

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