Title: Near- and Extended-Edge X-Ray-Absorption Fine-Structure Spectroscopy Using Ultrafast Coherent High-Order Harmonic Supercontinua
Authors: Popmintchev, Dimitar 
Galloway, Benjamin  
Chen, Ming-Chang 
Dollar, Franklin 
Mancuso, Christopher  
Hankla, Amelia (Lia)  
Miaja Avila, Luis  
O'Neil, Galen  
Shaw, Justin M 
Fan, Guangyu 
Alisauskas, Skirmantas 
Andriukaitis, Giedrius 
Balciunas, Tadas 
Mücke, Oliver D.  
Pugzlys, Audrius 
Baltuska, Andrius 
Kapteyn, Henry C 
Popmintchev, Tenio 
Murnane, Margaret 
Category: Original Research Article
Issue Date: 2-Mar-2018
Popmintchev, D., Galloway, B., Chen, M.-C., Dollar, F., Mancuso, C., Hankla, A. (Lia), Miaja Avila, L., O’Neil, G., Shaw, J. M., Fan, G., Ališauskas, S., Andriukaitis, G., Balčiūnas, T., Mücke, O. D., Pugzlys, A., Baltuska, A., Kapteyn, H., Popmintchev, T., & Murnane, M. (2018). Near- and Extended-Edge X-Ray-Absorption Fine-Structure Spectroscopy Using Ultrafast Coherent High-Order Harmonic Supercontinua. Physical Review Letters, 120(9), 093002. https://doi.org/10.1103/PhysRevLett.120.093002
Journal: Physical Review Letters 
ISSN: 0031-9007
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 10^{9}  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 10^{26}  photons/s/mrad^{2}/mm^{2}/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.
Keywords: high-order harmonic generation; laser spectroscopy; X-ray beams & optics
DOI: 10.1103/PhysRevLett.120.093002
Organisation: E387-01 - Forschungsbereich Photonik 
License: Urheberrechtsschutz 1.0
Publication Type: Article
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