Multidimensional X-Ray Spectroscopy of Valence and Core Excitations in Cysteine
TLDR
The coupling between valence- and core-excited states can be visualized in three-dimensional plots, revealing the origin of the polarizability that controls the simpler pump-probe SXRS signals.Abstract:
Several nonlinear spectroscopy experiments which employ broadband x-ray pulses to probe the coupling between localized core and delocalized valence excitation are simulated for the amino acid cysteine at the K-edges of oxygen and nitrogen and the K and L-edges of sulfur. We focus on two dimensional (2D) and 3D signals generated by two- and three-pulse stimulated x-ray Raman spectroscopy (SXRS) with frequency-dispersed probe. We show how the four-pulse x-ray signals $\boldsymbol{k}_\mathrm{I}=-\boldsymbol{k}_1+\boldsymbol{k}_2+\boldsymbol{k}_3$ and $\boldsymbol{k}_\mathrm{II}=\boldsymbol{k}_1-\boldsymbol{k}_2+\boldsymbol{k}_3$ can give new 3D insight into the SXRS signals. The coupling between valence- and core-excited states can be visualized in three dimensional plots, revealing the origin of the polarizability that controls the simpler pump-probe SXRS signals.read more
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References
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TL;DR: Two-dimensional x-ray correlation spectra obtained by varying two delay periods in a time-resolved coherent all-x-ray four-wave-mixing measurement are simulated for the N 1s and O 1s transitions of aminophenol.
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Two-color phase-sensitive x-ray pump-probe spectroscopy
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TL;DR: X-ray pump-probe spectroscopy is studied theoretically in this paper, where it is shown that two-color-optical+x-ray-excitation with constant phase of the pump radiation exhibits strong interference between the one-colour and one-ray spectra.
Journal Article
Two-color phase-sensitive x-ray pump-probe spectroscopy (9 pages)
TL;DR: X-ray pump-probe spectroscopy is studied theoretically in this paper, where it is shown that two-color-optical+x-ray-excitation with constant phase of the pump radiation exhibits strong interference between the one-colour and one-ray spectra.
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Probe of the electron correlation in sequential double ionization of helium by two-color attosecond pulses
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