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Propagation-enhanced generation of intense high-harmonic continua in the 100-eV spectral region
Max-Planck-Institut fur Quantenoptik, Garching, Germany.
Department of Optics and Quantum Electronics, University of Szeged, Szeged, Hungary.
Max-Planck-Institut fur Quantenoptik, Garching, Germany.
Fakultat fur Physik, Ludwig-Maximilians-Universitat Munchen, Garching, Germany; Physics Department, Technische Universität München, Garching, Germany.
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2018 (English)In: Optica, ISSN 2334-2536, Vol. 5, no 10, p. 1283-1289Article in journal (Refereed) Published
Abstract [en]

The study of core electron dynamics through nonlinear spectroscopy requires intense isolated attosecond extremeultraviolet or even X-ray pulses. A robust way to produce these pulses is high-harmonic generation (HHG) in agas medium. However, the energy upscaling of the process depends on a very demanding next-generation laser technologythat provides multi-terawatt (TW) laser pulses with few-optical-cycle duration and controlled electric field.Here, we revisit the HHG process driven by 16-TW sub-two-cycle laser pulses to reach high intensity in the 100-eVspectral region and beyond. We show that the combination of above barrier-suppression intensity with a long generationmedium significantly enhances the isolation of attosecond pulses compared to lower intensities and/or shortermedia and this way reduces the pulse duration as well as field-stability requirements on the laser driver. This novelregime facilitates the real-time observation of electron dynamics at the attosecond timescale in atoms, molecules, andsolids.

Place, publisher, year, edition, pages
2018. Vol. 5, no 10, p. 1283-1289
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:umu:diva-152610DOI: 10.1364/OPTICA.5.001283ISI: 000447853100017Scopus ID: 2-s2.0-85055630738OAI: oai:DiVA.org:umu-152610DiVA, id: diva2:1256024
Funder
Swedish Research Council, 2016-05409Available from: 2018-10-15 Created: 2018-10-15 Last updated: 2018-12-13Bibliographically approved

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Veisz, Laszlo

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