Wavefront control lies at the heart of modern optics. Metasurfaces with specifically tailored
resonators can encode different phases to two orthogonal polarization components, but …

We develop a method to characterize arbitrary superpositions of light orbital angular
momentum (OAM) with high fidelity by using astigmatic transformation and machine-learning …

We demonstrate the spin to orbital angular momentum transfer in frequency upconversion
with structured light beams. A vector vortex is coupled to a circularly polarized Gaussian …

Studying the conversion between transverse light modes via four-wave mixing in a heated
rubidium vapor, we demonstrate and explain a transfer between azimuthal and radial mode …

We demonstrate the generation of high-quality tunable terahertz (THz) vortices in an
eigenmode by employing soft-aperture difference frequency generation of vortex and …

We have demonstrated efficiency of employing the ABCD matrix approach to transform
higher-order structured Laguerre–Gaussian (sLG) beams into structurally stable astigmatic …

An all-liquid-crystal device for fast orbital angular momentum encoding and optical vortex
beam steering is proposed and demonstrated. It is a combination of a cascaded spin …

Since the diffraction behavior of a light field is fully determined by its spatial wavefunction, ie,
its spatial complex amplitude (SCA), full characterization of spatial wavefunction plays a vital …

The twisted Laguerre–Gaussian Schell-model (TLGSM) beam is a novel type of partially
coherent beam embedded with both the second-order twist phase and the classical vortex …

Polarization ellipses are well-known as the result of coherent superposition of photonic spin
states. As orbital counterparts, in this Letter, we introduce centroid ellipses that are …