High-harmonic generation (HHG) has emerged as a pivotal process in strong-field physics,
yielding extreme ultraviolet radiation and attosecond pulses for a wide range of applications …

The ultrafast dynamics of electrons in solid-state systems have garnered considerable
attention recently, driven by technological advancements in the generation of short laser …

Ultrafast lasers are an increasingly important tool to control and stabilize emergent phases
in quantum materials. Among a variety of possible excitation protocols, a particularly …

Since the discovery of ultrafast demagnetization in Ni thin films in 1996, laser-induced
ultrafast spin dynamics have become a prominent research topic in the field of magnetism …

Ultrafast control of magnetization on the nanometer length scale, in particular all-optical
switching, is key to putting ultrafast magnetism on the path toward future technological …

When materials are exposed to X-ray pulses with sufficiently high intensity, various
nonlinear effects can occur. The most fundamental one consists of stimulated electronic …

The advent of free-electron lasers (FELs) in the soft-and hard-x-ray spectral regions has
introduced the possibility to probe electronic, magnetic, and structural dynamics, in both …

Time-resolved x-ray magnetic circular dichroism (XMCD) enables a unique spectroscopic
view on complex spin and charge dynamics in multi-elemental magnetic materials. So far, its …

The ultrafast and element-specific response of magnetic systems containing ferromagnetic 3
d transition metals and 4 d/5 d heavy metals is of interest both from a fundamental as well as …

Femtosecond transient soft X-ray absorption spectroscopy (XAS) is a very promising
technique that can be employed at X-ray free-electron lasers (FELs) to investigate out-of …