Over more than a century, X-rays have transformed our understanding of the fundamental
structure of matter and have been an indispensable tool for chemistry, physics, biology …

X-ray free-electron lasers (XFELs) and table-top sources of x-rays based upon high
harmonic generation (HHG) have revolutionized the field of ultrafast x-ray atomic and …

Optical interactions are governed by both spin and angular momentum conservation laws,
which serve as a tool for controlling light–matter interactions or elucidating electron …

The strong ellipticity dependence of high-harmonic generation (HHG) in gases enables
numerous experimental techniques that are nowadays routinely used, for instance, to create …

Ptychographic Coherent Diffractive Imaging enables diffraction-limited imaging of nanoscale
structures at extreme ultraviolet and x-ray wavelengths, where high-quality image-forming …

Attosecond spectroscopic techniques have made it possible to measure differences in
transport times for photoelectrons from localized core levels and delocalized valence bands …

High-harmonic (HH) generation in crystalline solids,,,,, marks an exciting development, with
potential applications in high-efficiency attosecond sources, all-optical bandstructure …

In this review, we report on recent progress in the generation and application of
multichromatic polarization-tailored pulse sequences for the coherent control of multiphoton …

Spin-polarized light-emitting diodes (spin-LEDs) convert the electronic spin information to
photon circular polarization, offering potential applications including spin amplification …

High harmonics driven by two-color counterrotating circularly polarized laser fields are a
unique source of bright, circularly polarized, extreme ultraviolet, and soft x-ray beams, where …