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Near- and extended-edge x-ray-absorption fine-structure spectroscopy using ultrafast coherent high-order harmonic supercontinua



Dimitar Popmintchev, Benjamin Galloway, Ming-Chang Chen, Franklin Dolar, Christopher Mancuso, Amelia Hankla, Luis Miaja Avila, Galen O'Neil, Guangyu Fan, Skirmantas Alisauskas, Giedrius Andriukaitis, Tadas Balciunas, Oliver M?cke, Audrius Pugzlys, Andrius Baltuska, Henry C. Kapteyn, Tenio Popmintchev, Margaret M. Murnane


Phase matching of the high-order harmonic generation process now makes it possible to produce spatially and temporally coherent ultrafast X-ray beams, with bandwidths spanning more than 12 octaves, from the UV to the keV region. Here we report the first static X-ray absorption spectroscopy at the K- and L-absorption edges of solids in the near-keV range. We also demonstrate X-ray absorption spectroscopy in the β€˜water window' spectral region (284 - 541 𝑒𝑉) using an X-ray supercontinuum with high flux (109 π‘β„Žπ‘œπ‘‘π‘œπ‘›π‘ /𝑠 𝑖𝑛 1% π‘π‘Žπ‘›π‘‘π‘€π‘–π‘‘π‘‘β„Ž), which is two orders of magnitude larger than has been previously demonstrated. In the future, because this X-ray radiation emerges as an isolated single attosecond-to-femtosecond burst, with peak brilliance exceeding 1026 π‘β„Žπ‘œπ‘‘π‘œπ‘›π‘ /𝑠/π‘šπ‘Ÿπ‘Žπ‘‘2/π‘šπ‘š2/1% π‘π‘Žπ‘›π‘‘π‘€π‘–π‘‘π‘‘β„Ž, these novel coherent X-ray sources will be ideal for dynamic probing of the fastest processes in molecules and materials on sub-femtosecond time and picometer length scales.
Physical Review B


x-ray absorption, spectroscopy, ultrafast coherent, harmonic supercontinua


Popmintchev, D. , Galloway, B. , Chen, M. , Dolar, F. , Mancuso, C. , Hankla, A. , Miaja Avila, L. , O'Neil, G. , Fan, G. , Alisauskas, S. , Andriukaitis, G. , Balciunas, T. , M?cke, O. , Pugzlys, A. , Baltuska, A. , Kapteyn, H. , Popmintchev, T. and Murnane, M. (2018), Near- and extended-edge x-ray-absorption fine-structure spectroscopy using ultrafast coherent high-order harmonic supercontinua, Physical Review B, [online],, (Accessed June 17, 2024)


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Created February 28, 2018, Updated October 12, 2021