Structured light, especially beams carrying orbital angular momentum (OAM), has gained
much interest due to its unique amplitude and phase structures. In terms of communication …

Metasurfaces have been continuously garnering attention in both scientific and industrial
fields, owing to their unprecedented wavefront manipulation capabilities using arranged …

Structured light refers to the arbitrarily tailoring of optical fields in all their degrees of freedom
(DoFs), from spatial to temporal. Although orbital angular momentum (OAM) is perhaps the …

Toroidal vortices, also known as vortex rings, are whirling, closed-loop disturbances that
form a characteristic ring shape in liquids and gases and propagate in a direction that is …

BACKGROUND Optical vortices provide one of the promising solutions for enhancing the
capacity of data multiplexing to meet an unprecedented growth in big data and internet traffic …

With inherent orthogonality, both the spin angular momentum (SAM) and orbital angular
momentum (OAM) of photons have been utilized to expand the dimensions of quantum …

Orbital angular momentum (OAM), which describes tailoring the spatial physical dimension
of light waves into a helical phase structure, has given rise to many applications in optical …

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 …

Abstract Space-division multiplexing (SDM), as a main candidate for future ultra-high
capacity fibre-optic communications, needs to address limitations to its scalability imposed …

The orbital angular momentum is a fundamental degree of freedom of light wavefronts,
currently exploited in applications where information capacity is a key requirement, such as …