Interatomic or intermolecular Coulombic decay (ICD) is a nonlocal electronic decay
mechanism occurring in weakly bound matter. In an ICD process, energy released by …

This review provides a comprehensive overview of the applications of helium nanodroplets
in the study of ensembles of atoms and molecules, ie clusters and complexes. These …

Extreme ultraviolet and X-ray free-electron lasers (FELs) produce short-wavelength pulses
with high intensity, ultrashort duration, well-defined polarization and transverse coherence …

Photoinduced isomerization reactions lie at the heart of many chemical processes in nature.
The mechanisms of such reactions are determined by a delicate interplay of coupled …

The light-induced ultrafast switching between molecular isomers norbornadiene and
quadricyclane can reversibly store and release a substantial amount of chemical energy …

Photons have fixed spin and unbounded orbital angular momentum (OAM). While the former
is manifested in the polarization of light, the latter corresponds to the spatial phase …

Helium nanodroplets, commonly regarded as the 'nearly ideal spectroscopic matrix', are
being actively studied for more than two decades now. While they mostly serve as cold …

The first steps in photochemical processes, such as photosynthesis or animal vision, involve
changes in electronic and geometric structure on extremely short time scales. Time-resolved …

The recent development of ultrafast extreme ultraviolet (XUV) coherent light sources bears
great potential for a better understanding of the structure and dynamics of matter. Promising …

Quantum mechanically, photoionization can be fully described by the complex
photoionization amplitudes that describe the transition between the ground state and the …