In the past 20 years, we have reached a broad understanding of many light-driven
phenomena in nanoscale systems. The temporal dynamics of the excited states are instead …

Free-electron lasers and high-harmonic-generation table-top systems are new sources of
extreme-ultraviolet to hard X-ray photons, providing ultrashort pulses that are intense …

The recent construction of free electron lasers allows extending laboratory-based laser
experiments to shorter wavelengths, accessing wavevectors typical of nanoscale dynamics …

Collective lattice dynamics determine essential aspects of condensed matter, such as elastic
and thermal properties. These exhibit strong dependence on the length-scale, reflecting the …

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 …

We use femtosecond extreme ultraviolet pulses derived from a free electron laser to excite
and probe surface acoustic waves (SAWs) on the (001) surface of single crystal SrTiO 3 …

The advent of free electron lasers has opened the opportunity to explore interactions
between extreme ultraviolet (EUV) photons and collective excitations in solids. While EUV …

Uncovering pathways to optically drive magnetic order-disorder transitions on ultrashort
timescales can lead to the realization of novel out-of-equilibrium quantum phenomena. A …

Time-resolved optical spectroscopy represents an effective non-invasive approach to
investigate the interplay of different degrees of freedom, which plays a key role in the …

All-optical switching (AOS) results in ultrafast and deterministic magnetization reversal upon
single laser pulse excitation, potentially supporting faster and more energy-efficient data …