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Near- and Extended-Edge X-Ray-Absorption Fine-Structure Spectroscopy Using Ultrafast Coherent High-Order Harmonic Supercontinua

TitleNear- and Extended-Edge X-Ray-Absorption Fine-Structure Spectroscopy Using Ultrafast Coherent High-Order Harmonic Supercontinua
Publication TypeJournal Article
Year of Publication2018
AuthorsPopmintchev, D, Galloway, BR, Chen, M-C, Dollar, F, Mancuso, CA, Hankla, A, Miaja-Avila, L, O’Neil, G, Shaw, JM, Fan, G, Ališauskas, S, Andriukaitis, G, Balčiunas, T, Mücke, OD, Pugzlys, A, Baltuška, A, Kapteyn, HC, Popmintchev, T, Murnane, MM
JournalPhysical Review Letters
Volume120
Issue9
Date Published2018-03
ISSN0031-9007
Keywordsspectroscopy, x-ray
Abstract

Recent advances in high-order harmonic generation have made it possible to use a tabletop-scale setup to produce spatially and temporally coherent beams of light with bandwidth spanning 12 octaves, from the ultraviolet up to x-ray photon energies >1.6 keV. Here we demonstrate the use of this light for x-ray-absorption spectroscopy at the K- and L-absorption edges of solids at photon energies near 1 keV. We also report x-ray-absorption spectroscopy in the water window spectral region (284–543 eV) using a high flux high-order harmonic generation x-ray supercontinuum with 109 photons/s in 1% bandwidth, 3 orders of magnitude larger than has previously been possible using tabletop sources. Since this x-ray radiation emerges as a single attosecond-to-femtosecond pulse with peak brightness exceeding 1026 photons/s/mrad2/mm2/1% bandwidth, these novel coherent x-ray sources are ideal for probing the fastest molecular and materials processes on femtosecond-to-attosecond time scales and picometer length scales.

URLhttps://journals.aps.org/prl/pdf/10.1103/PhysRevLett.120.093002
DOI10.1103/PhysRevLett.120.093002
Short TitlePhys. Rev. Lett.

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