In 1832 Hamilton predicted that a collimated light beam propagating through a biaxial crystal
parallel to one of its optical axes refracts as a slanted cone within the crystal and emerges as …

Toroidal modes in the form of so-called Hopfions, with two independent winding numbers, a
hidden one (twist s), which characterizes a circular vortex thread embedded into a three …

We present a novel approach for the optical manipulation of neutral atoms in annular light
structures produced by the phenomenon of conical refraction occurring in biaxial optical …

Motivated by a recent experiment [KC Wright, Phys. Rev. Lett. 110, 025302 (2013) PRLTAO
0031-9007 10.1103/PhysRevLett. 110.025302], we investigate deterministic discontinuous …

We investigate prospects of using counter-rotating vortex superposition states in
nonequilibrium exciton-polariton Bose-Einstein condensates for the purposes of Sagnac …

Vortex beams have application potential in multiplexing communication because of their
orthogonal orbital angular momentum (OAM) modes. OAM add–drop multiplexing remains a …

Interference of a fundamental vortex-free Gaussian beam with a co-propagating plane wave
leads to nucleation of a series of vortex rings in the planes transverse to the optical axis; the …

The topological transition of vortex lines to vortex rings and hopfions is numerically
investigated by the Gross–Pitaevskii equation in three-dimensional trapped Bose–Einstein …

This study presents an innovative application of inkjet printing technology in the construction
of a switchable optical vortex beam generator. The fabrication process involves drop‐on …

We reveal that Hopf solitons can be stabilized in rotating atomic Bose-Einstein condensates.
The Hopfion is a matter-wave vortex complex which carries two independent winding …