In quantum materials, emergent functional properties resulting from strong correlations or
electronic topology offer opportunities for new applications. Over the past decade, ultrafast …

Since the first demonstration of the generation of attosecond pulses (1 as= 10− 18 s) in the
extreme-ultraviolet spectral region, several measurement techniques have been introduced …

The possibility to excite and control charges in matter on ultrafast timescales is a key
requisite to overcome the current limits of information transfer and data processing. The …

The electro-optical properties of most semiconductors and insulators of technological
interest are dominated by the presence of electron-hole quasi-particles, called excitons. The …

Excitation of ionic solids with extreme ultraviolet pulses creates localized core-level excitons,
which in some cases couple strongly to the lattice. Here, core-level-exciton states of …

Improving the brightness of high-harmonic generation (HHG) sources is one of the major
goals for next-generation ultrafast, imaging and metrology applications in the extreme …

Second harmonic generation (SHG) spectroscopy ubiquitously enables the investigation of
surface chemistry, interfacial chemistry, as well as symmetry properties in solids …

In photocatalytic transition metal oxides, the surface electronic structure and carrier kinetics
are complicated by both charge trapping at defects and self-trapping by small polaron …

Conspectus Extreme ultraviolet light sources based on high harmonic generation are
enabling the development of novel spectroscopic methods to help advance the frontiers of …

In this manuscript, after discussing in detail the internals of our recently developed method,
the dynamical projective operatorial approach (DPOA), we provide the framework to apply …