Results 41 to 50 of about 2,371 (296)
Observation of Polarization Singularities at the Nanoscale
Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, 2009 With a phase-sensitive near-field microscope we measure independently the two in-plane electric field components of light propagating through a 2D photonic crystal waveguide and the phase difference between them. Consequently, we are able to reconstruct the electric vector field distribution with subwavelength resolution.
M, Burresi +6 more
openaire +2 more sources
Coherence-induced depolarization effects in polarization singular beams
, 2022 We demonstrate theoretically and experimentally coherence-induced depolarization effects in generic and higher index polarization singular beams endowed with C-point (or V-point) polarization singularity.
Joshi, Stuti +2 more
core +1 more source
Toroidal polarization vortices in tightly focused beams with singularity
Компьютерная оптика, 2020 In this paper, we numerically investigated tight focusing of cylindrical vector beams of the sec-ond order using Richards-Wolf formulae. It was shown that intensity rings where the Poynting vector was equal to zero appeared not only in the focal plane ...
S.S. Stafeev, V.V. Kotlyar
doaj +1 more source
Micromachines, 2023 Elements of micromachines can be driven by light, including structured light with phase and/or polarization singularities. We investigate here a paraxial vector Gaussian beam with an infinite number of polarization singularities residing evenly on a ...
Alexey A. Kovalev +2 more
doaj +1 more source
Polarization singularities: Topological and dynamical aspects
Frontiers in Physics, 2023 The review describes general principles and characteristics of inhomogeneously polarized paraxial optical fields and, especially, the polarization singularities (PSs).
O. V. Angelsky +6 more
doaj +1 more source
New mechanism for polarization singularity of vector vortex beams
, 2020 It was recently realized that the polarization bases of the plane-wave modes in the integral representation of a light beam need to be determined by a degree of freedom arising from the divergence-free Maxwell's equation.
Chun-Fang Li (748504)
core +1 more source
Polarization conversion when focusing cylindrically polarized vortex beams
Scientific Reports, 2016 Currently, cylindrical beams with radial or azimuthal polarization are being used successfully for the optical manipulation of micro- and nano-particles as well as in microscopy, lithography, nonlinear optics, materials processing, and telecommunication ...
Alexey P. Porfirev +2 more
doaj +1 more source
Sharp focusing of a light field with polarization and phase singularities of an arbitrary order [PDF]
Компьютерная оптика, 2019 Using the Richards-Wolf formalism, we obtain general expressions for all components of the electric and magnetic strength vectors near the sharp focus of an optical vortex with the topological charge m and nth-order azimuthal polarization.
Victor Kotlyar +2 more
doaj +1 more source
Photonics, 2023 The generation of Bessel beams (BBs) and their characterization in a wide range of the electromagnetic spectrum are well established. The unique properties of BBs, including their non-diffracting and self-healing nature, make them efficient for use in ...
A. Srinivasa Rao
doaj +1 more source
Hilbert’s Hotel in polarization singularities
Optics Letters, 2017 We demonstrate theoretically how the creation of polarization singularities by the evolution of a fractional nonuniform polarization optical element involves the peculiar mathematics of countably infinite sets in the form of "Hilbert's Hotel." Two distinct topological processes can be observed, depending on the structure of the fractional optical ...
Yangyundou, Wang, Greg, Gbur
openaire +2 more sources