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 …

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 …

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 …

Recent developments of high harmonic generation (HHG) have enabled the production of
structured extreme-ultraviolet (EUV) ultrafast laser beams with orbital angular momentum …

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 …

In the rapidly evolving field of structured light, self-torque has been recently defined as an
intrinsic property of light beams carrying time-dependent orbital angular momentum. In …

High-order harmonics can generate vortex beams with orbital angular momentum (OAM) in
the extreme ultraviolet region. However, experimental research on their phase-matching …

We experimentally demonstrate that ptychographic coherent diffractive imaging can be used
to simultaneously characterize the amplitude and phase of bichromatic orbital angular …