Structured light in the short-wavelength regime opens exciting avenues for the study of
ultrafast spin and electronic dynamics. Here, we demonstrate theoretically and
experimentally the generation of vector-vortex beams (VVB) in the extreme ultraviolet
through high-order harmonic generation (HHG). The up-conversion of VVB, which are
spatially tailored in their spin and orbital angular momentum, is ruled by the conservation of
the topological Pancharatnam charge in HHG. Despite the complex propagation of the …

Structured light in the short-wavelength regime opens exciting avenues for the study of
ultrafast spin and electronic dynamics. Here, we demonstrate theoretically and
experimentally the generation of vector-vortex beams (VVB) in the extreme ultraviolet
through high-order harmonic generation (HHG). The up-conversion of VVB, which are
spatially tailored in their spin and orbital angular momentum, is ruled by the conservation of
the topological Pancharatnam charge in HHG. Despite the complex propagation of the …