Research on isolated attosecond pulses (IAPs) based on high-order harmonic generation
changed substantially around 2010. Before then, the Ti: sapphire laser was the de facto …

This article reviews recent progress leading to the generation of optical vortex beams. After
introducing the basics of optical vortex beams and their promising applications, we …

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 …

INTRODUCTION Light beams carry both energy and momentum, which can exert a small
but detectable pressure on objects they illuminate. In 1992, it was realized that light can also …

Symmetries and conservation laws of energy, linear momentum, and angular momentum
play a central role in nonlinear optics. Recently, paraxial light fields with nontrivial topology …

Structured light in the short-wavelength regime opens exciting avenues for the study of
ultrafast spin and electronic dynamics. Here, we demonstrate theoretically and …

The landscape of ultrafast structured light pulses has significantly advanced thanks to the
ability of high-order harmonic generation (HHG) to translate the spatial properties of infrared …

Linearly polarized vector beams are structured lasers whose topology is characterized by a
well-defined Poincaré index, which is a topological invariant during high-order harmonic …

We report the generation of vector and vortex high-order harmonic beams in argon using the
femtosecond laser pulses propagated through the phase-modifying optical elements (S …

High-order harmonic generation stands as a unique nonlinear optical up-conversion
process, mediated by a laser-driven electron recollision mechanism, which has been shown …