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High-order parametric generation of coherent XUV radiation

Abstract : Extreme ultraviolet (XUV) radiation finds numerous applications in spectroscopy. When the XUV light is generated via high-order harmonic generation (HHG), it may be produced in the form of attosecond pulses, allowing access to unprecedented ultrafast phenomena. However, the HHG efficiency remains limited. Here we present an observation of a new regime of coherent XUV emission which has a potential to provide higher XUV intensity, vital for applications. We explain the process by high-order parametric generation, involving the combined emission of THz and XUV photons, where the phase matching is very robust against ionization. This introduces a way to use higher-energy driving pulses, thus generating more XUV photons.
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https://hal.archives-ouvertes.fr/hal-03151024
Contributor : Eric Constant <>
Submitted on : Wednesday, February 24, 2021 - 1:30:28 PM
Last modification on : Wednesday, March 10, 2021 - 3:33:03 AM

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O Hort, A Dubrouil, M Khokhlova, D Descamps, S Petit, et al.. High-order parametric generation of coherent XUV radiation. Optics Express, Optical Society of America - OSA Publishing, 2021, ⟨10.1364/OE.418449⟩. ⟨hal-03151024⟩

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