Thirty years ago, Coullet et al. proposed that a special optical field exists in laser cavities
bearing some analogy with the superfluid vortex. Since then, optical vortices have been …

Structured light is derived from the ability to tailor light, usually referring to the spatial control
of its amplitude, phase, and polarization. Although a venerable topic that dates back to the …

Quantum metrology is one of the most promising applications of quantum technologies. The
aim of this research field is the estimation of unknown parameters exploiting quantum …

Vector vortex beams have attracted considerable research attention owing to their unique
optical properties, and have been explored in vortex filtering, photon entanglement, and the …

Vector beams, and in particular vector vortex beams, have found many applications in recent
times, both as classical fields and as quantum states. While much attention has focused on …

Geometric phase is a unifying and central concept in physics, including optics. As a matter of
fact, optics played a pivotal role from the inception of this new paradigm, as some of the first …

Research on spatially structured light has seen an explosion in activity over the past
decades, powered by technological advances for generating such light and driven by …

We propose an efficient and robust method to generate tunable vector beams by employing
a single phase-type spatial light modulator (SLM). With this method, a linearly polarized …

Graded index (GRIN) lenses are commonly used for compact imaging systems. It is not
widely appreciated that the ion-exchange process that creates the rotationally symmetric …

A digital-coding programmable metasurface (DCPM) is a type of functional system that is
composed of subwavelength-scale digital coding elements with opposite phase responses …