22 citations · 33 across the 6 of their papers we have counts for
9 papers
Polariton spectroscopy at the diamond K-edge via X-ray parametric down-conversion
Fridtjof Kerker, Dietrich Krebs, Xenia Brockmüller +4
It has recently been shown that x-ray parametric down-conversion (XPDC) provides access to high-energy polaritons, resulting from the hybridization of down-converted photons with e…
Probing the Linewidth of the 12.4-keV Sc Isomeric Resonance in Solids by Nuclear Forward Scattering
Peifan Liu, Miriam Gerharz, Berit Marx-Glowna +37
The Sc transition from the nuclear ground state to the 12.389-keV isomer (lifetime 0.46~s) has an ultranarrow natural linewidth $Γ_{\ind{0}}\simeq 1.4$~feV, corresponding to…
Redirection and Reshaping of Intense Extreme-Ultraviolet Radiation
Yu He, Alexander Magunia, Harijyoti Mandal +29
The goal to control short-wavelength radiation for the investigation and manipulation of ultrafast dynamics in quantum systems coevolves with the growing availability of extreme-ul…
On the use of multilayer Laue lenses with X-ray Free Electron Lasers
Mauro Prasciolu, Kevin T. Murray, Nikolay Ivanov +34
Multilayer Laue lenses were used for the first time to focus x-rays from an X-ray Free Electron Laser (XFEL). In an experiment, which was performed at the European XFEL, we demonst…
Theory of parametric x-ray optical wavemixing processes
Dietrich Krebs, Nina Rohringer
Enabled by x-ray free-electron lasers, nonlinear optical phenomena can be explored in the x-ray domain nowadays. Among the multitude of newly accessible processes, this theoretical…
Towards novel probes for valence charges via X-ray optical wave mixing
Christina Boemer, Dietrich Krebs, Andrei Benediktovitch +3
We present a combined theoretical and experimental study of X-ray optical wave mixing. This class of nonlinear phenomena combines the strengths of spectroscopic techniques from the…
Nonlinear resonant X-ray Raman scattering
Johann Haber, Andreas Kaldun, Samuel W. Teitelbaum +12
We report the observation of a novel nonlinear effect in the hard x-ray range. Upon illuminating Fe and Cu metal foils with intense x-ray pulses tuned near their respective K edges…
X-ray parametric down-conversion: Challenging previous findings on the basis of improved experimental methods
Christina Boemer, Dietrich Krebs, Michael Diez +3
X-ray parametric down-conversion is a fundamental nonlinear effect that promises a wide range of possible applications. Nevertheless, it has been scarcely investigated and unequivo…
Introducing many-body physics using atomic spectroscopy
Dietrich Krebs, Stefan Pabst, Robin Santra
Atoms constitute relatively simple many-body systems, making them suitable objects for developing an understanding of basic aspects of many-body physics. Photoabsorption spectrosco…