The paper briefly presents some essential concepts and features of light fields with strong
spatial inhomogeneity of amplitude, phase, polarization, and other parameters. It contains a …

Both classical and quantum waves can form vortices: entities with helical phase fronts and
circulating current densities. These features determine the intrinsic orbital angular …

We analyze the properties of light beams carrying phase singularities, or optical vortices.
The transformations of topological charge during free-space propagation of a light wave …

Optical vortices in linear and nonlinear media may exhibit propagation dynamics similar to
hydrodynamic vortex phenomena. Analytical and numerical methods are used to describe …

We analyze screw, edge and mixed screw-edge dislocations in monochromatic light waves.
Methods for the experimental determination of the topological charge value and helicity of …

The singularities of complex scalar waves are their zeros; these are dislocation lines in
space, or points in the plane. For waves in space, and waves in the plane (propagating in …

Phase singularities (topological charges, dislocations, defects, vortices, etc.), which may be
either positive or negative in sign, are found in many different types of wave fields. We show …

Polarization singularities are superpositions of orbital angular momentum (OAM) states in
orthogonal circular polarization basis. The intrinsic OAM of light beams arises due to the …

Since the second half of the 20th century, ideas to develop methods for the formation of
optical vortices (OVs) or OV beams–regions of circular motion of energy flow in an …

Singularities are ubiquitous in nature and generate high levels of interest and activity among
scientists. At a singularity, a parameter of interest becomes indeterminate, a single point at …