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 …

High harmonic generation (HHG) with longitudinal optical orbital angular momentum has
attracted much attention over the past decade. Here, we present the first study on the HHG …

High-harmonic generation driven by femtosecond lasers makes it possible to capture the
fastest dynamics in molecules and materials. However, thus far, the shortest isolated …

Vortex light beams are structures of the electromagnetic field with a spiral phase ramp
around a point-phase singularity. These vortices have many applications in the optical …

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 …

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 …

The shortest light pulses produced to date are of the order of a few tens of attoseconds, with
central frequencies in the extreme UV range and bandwidths exceeding tens of …

Many applications of the extreme ultraviolet (XUV) radiation obtained by high-order
harmonic generation (HHG) in gases require a small focus area in order to enable …