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Tabletop nonlinear optics in the 100-eV spectral region
Umeå University, Faculty of Science and Technology, Department of Physics. Max-Planck-Institut für Quantenoptik, Garching, Germany.
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2018 (English)In: Optica, ISSN 2334-2536, Vol. 5, no 3, p. 237-242Article in journal (Refereed) Published
Abstract [en]

Nonlinear light-matter interactions in the extreme ultraviolet (XUV) are a prerequisite to perform XUV-pump/XUV-probe spectroscopy of core electrons. Such interactions are now routinely investigated at free-electron laser (FEL) facilities. Yet, electron dynamics are often too fast to be captured with the femtosecond resolution of state-of-the-art FELs. Attosecond pulses from laser-driven XUV-sources offer the necessary temporal resolution. However, intense attosecond pulses supporting nonlinear processes have only been available for photon energy below 50 eV, precluding XUV-pump/XUV-probe investigation of typical inner-shell processes. Here, we surpass this limitation by demonstrating two-photon absorption from inner electronic shells of xenon at photon energies around 93 eV and 115 eV. This advance opens the door for attosecond real-time observation of nonlinear electron dynamics deep inside atoms.

Place, publisher, year, edition, pages
Optical Society of America, 2018. Vol. 5, no 3, p. 237-242
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:umu:diva-146429DOI: 10.1364/OPTICA.5.000237ISI: 000428145500003Scopus ID: 2-s2.0-85044288308OAI: oai:DiVA.org:umu-146429DiVA, id: diva2:1204668
Available from: 2018-05-08 Created: 2018-05-08 Last updated: 2018-09-14Bibliographically approved

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Muschet, AlexanderVeisz, Laszlo

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