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 …

The absence of efficient light modulators for extreme ultraviolet (EUV) and X-ray photons
considerably limits their real-life application, particularly when even slight complexity of the …

Extending nonlinear spectroscopic techniques into the x-ray domain promises unique
insight into photoexcited charge dynamics, which are of fundamental and applied interest …

Microscale energy transport processes are crucial in microelectronics, energy-harvesting
devices, and emerging quantum materials. To study these processes, methods that can …

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 …

Surface acoustic waves (SAWs) convey energy at subwavelength depths along surfaces.
Using interdigital transducers (IDTs) and opto-acousto-optic transducers (OAOTs) …

The characterization of thermal and elastic properties at the nanometer length scale is
fundamental for the implementation of materials in nanotechnology. Here, we show how four …

This contribution intends to convince readers that by virtue of the rich physics involved,
optical excitation, thermal diffusion, thermal expansion, and acoustic wave propagation, and …