Light's orbital angular momentum (OAM) with inherent mode orthogonality has been
suggested as a new way to the optical encryption. However, the dependence of annular …

Perfect vector vortex beams play a very important role in understanding complex structured
beams due to their vortex nature and nonuniform polarization profiles. However, the …

The edge enhancement technique, as an effective method to represent the boundary of
objects, plays an important role in image processing. Among them, the vortex filtering, which …

In this paper, we present an approach called the free lens modulation (FLM) method to
generate high-perfection 3D generalized perfect optical vortices (GPOVs) with topological …

We present an innovative approach for the simultaneous agile manipulation of high-
refractive-index (HRI) and low-refractive-index (LRI) particles. Our method involves …

Optical vortices, featured with an infinite number of orthogonal channels of orbital angular
momentum, have demonstrated marvelous potentials in optical multiplexing and associated …

We propose an orientation-selective elliptic optical vortex array (OS-EOVA). Using
multicoordinate (namely, polar, Cartesian, and elliptic) transformations, three kinds of …

Perfect vortex beams can only propagate stably with integer topological charges. Thus,
creating perfect fractional vortex beams capable of stable propagation in free space, as …

The perfect optical vortex (POV), the ring size being independent of its topological charge,
has found potential applications in optical tweezers and optical communications. In this …

An effective experiment scheme is proposed to generate the terahertz (THz) perfect optical
vortex (POV) beams by diffractive elements at the frequency of 0.1 THz. Two diffractive …