Advances in Attosecond Inner-Shell X-ray Laser Science
Invited-In-person · Invited
Abstract
We present our progress in exploring the phenomenon of stimulated x-ray emission spectroscopy (S-XES) based on inner-shell lasing at 6 – 8 keV as a new spectroscopy tool, and as a new source of ultrafast hard X-ray pulses. We first discuss the principle of S-XES, and the experimental methods required for generating and measuring it. We then discuss recent results for spectroscopy applications of S-XES and its potential and challenges of providing enhanced electronic structure sensitivity. We then discuss applications of S-XES as a powerful new x-ray source for probing attosecond dynamics. Here we present the observation of strong lasing effects and a new technique, X-ray coherent attosecond pulse pair spectroscopy (X-CAPPS) enabling interferometry for probing phenomena in the 500 attosecond to 5 femtosecond time window.
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Publication: Abhari et al, X-ray Coherent Attosecond Pulse Pair Spectroscopy, to be submitted
Kroll et al, Observation of Multiplet Lines in Seeded Stimulated Mn Kα1 X-ray Emission, arXiv:2503.03993v1
Linker et al, Attosecond inner-shell lasing at ångström wavelengths, Nature 642, 934–940 (2025)
Doyle et al, Seeded stimulated X-ray emission at 5.9 keV, Optica 10, 513-519 (2023)
Zhang et al, Generation of Intense Phase-Stable Femtosecond Hard X-ray Pulse Pairs, Proc Natl Acad Sci 119, e2119616119 (2022)
Presenters
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Uwe Bergmann
- University of Wisconsin - Madison