Results 31 to 40 of about 40,586 (284)
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
Curvature-induced Resolution of Anti-brane Singularities [PDF]
, 2014 We study AdS$_7$ vacua of massive type IIA string theory compactified on a 3-sphere with $H_3$ flux and anti-D6-branes. In such backgrounds, the anti-brane backreaction is known to generate a singularity in the $H_3$ energy density, whose interpretation ...
Junghans, Daniel +2 more
core +4 more sources
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
On Geometric Phase from Pure Projections [PDF]
, 1998 The geometric phase is usually treated as a quantity modulo 2\pi, a convention carried over from early work on the subject. The results of a series of optical interference experiments involving polarization of light, done by the present author (reviewed ...
Berry M. V. +9 more
core +2 more sources
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
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
Renormalon Singularities of the QCD Vacuum Polarization Function to Leading Order in $1/N_{f}$ [PDF]
, 1994 We explicitly determine the residues and orders of all the ultra-violet (UV) and infra-red (IR) renormalon poles in the Borel plane for the QCD vacuum polarization function (Adler D-function), to leading order in an expansion in the number of quark ...
't Hooft +22 more
core +2 more sources
On surfaces with p_g=q=2, K^2=5 and Albanese map of degree 3 [PDF]
, 2012 We construct a connected, irreducible component of the moduli space of minimal surfaces of general type with $p_g=q=2$ and $K^2=5$, which contains both examples given by Chen-Hacon and the first author. This component is generically smooth of dimension 4,
Penegini, Matteo, Polizzi, Francesco
core +2 more sources