Attosecond transient absorption spooktroscopy: A ghost imaging approach to ultrafast absorption spectroscopy

Taran Driver, Siqi Li, Elio G. Champenois, Joseph Duris, Daniel Ratner, Thomas J. Lane, Philipp Rosenberger, Andre Al-Haddad, Vitali Averbukh, Toby Barnard, Nora Berrah, Christoph Bostedt, Philip H. Bucksbaum, Ryan Coffee, Louis F. Dimauro, Li Fang, Douglas Garratt, Averell Gatton, Zhaoheng Guo, Gregor HartmannDaniel Haxton, Wolfram Helml, Zhirong Huang, Aaron Laforge, Andrei Kamalov, Matthias F. Kling, Jonas Knurr, Ming Fu Lin, Taran Drive, James P. MacArthur, Jon P. Marangos, Megan Nantel, Adi Natan, Razib Obaid, Jordan T. O'Neal, Niranjan H. Shivaram, Aviad Schori, Peter Walter, Anna Li Wang, Thomas J.A. Wolf, Agostino Marinelli, James P. Cryan

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40 Scopus citations


The recent demonstration of isolated attosecond pulses from an X-ray free-electron laser (XFEL) opens the possibility for probing ultrafast electron dynamics at X-ray wavelengths. An established experimental method for probing ultrafast dynamics is X-ray transient absorption spectroscopy, where the X-ray absorption spectrum is measured by scanning the central photon energy and recording the resultant photoproducts. The spectral bandwidth inherent to attosecond pulses is wide compared to the resonant features typically probed, which generally precludes the application of this technique in the attosecond regime. In this paper we propose and demonstrate a new technique to conduct transient absorption spectroscopy with broad bandwidth attosecond pulses with the aid of ghost imaging, recovering sub-bandwidth resolution in photoproduct-based absorption measurements.

Original languageEnglish
Pages (from-to)2704-2712
Number of pages9
JournalPhysical Chemistry Chemical Physics
Issue number5
StatePublished - 7 Feb 2020
Externally publishedYes

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