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 …

In this paper, we review the existing approaches for vortex and vector beam shaping and
generation in the terahertz frequency range. The particular focus of this review is on the …

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 …

To accommodate the ever-increasing wireless capacity, the terahertz (THz) orbital angular
momentum (OAM) beam that combines THz radiation and OAM technologies has attracted …

We demonstrate a new guiding regime termed endlessly mono-radial, in the proposed
annular core photonic crystal fiber (AC-PCF), whereby only modes of the fundamental radial …

We report on a programmable liquid crystal spatial light modulator enabling independent
orbital angular momentum state control on multiple spectral channels. This is done by using …

We report on a vortex laser chirped-pulse amplification (CPA) system that delivers pulses
with a peak power of 45 TW. A focused intensity exceeding 1019 W/cm2 has been …

We investigate an approach to short and medium-range wireless communications based on
the use of terahertz beams possessing an orbital angular momentum (OAM) that allows for …

We investigate the generation of broadband terahertz (THz) pulses with phase singularity
from air plasmas created by fundamental and second harmonic laser pulses. We show that …