Results 271 to 280 of about 2,371 (296)

Polarization filter with singular value decomposition

Geophysics, 2000
Abstract We present a singular value decomposition (SVD) based algorithm for polarization filtering of triaxial seismic recordings based on the assumption that the particle motion trajectory is essentially 2-D (elliptical polarization).
De Franco R, Musacchio G
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Polarization singularity democracy: WYSIWYG

Optics Letters, 2004
The canonical point singularity of elliptically polarized light is a C point, an isolated point of circular polarization surrounded by a field of polarization ellipses. The defining singular property of a C point is that the surrounding ellipses rotate about the point. It is shown that this rotation is seen only for a particular line of sight (LOS) and,
openaire   +2 more sources

Numerical Treatment of Polar Coordinate Singularities

Journal of Computational Physics, 2000
The authors present a method for eliminating the coordinate singularities whereby singular coordinates are redefined so that data are smoothly differentiated through the pole. The method avoids to place a grid point directly at the pole, and consequently eliminates the need for any pole equation.
Mohseni, Kamran, Colonius, Tim
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Sculpting complex polarization singularity networks

Optics Letters, 2018
Polarization singularities in vectorial light fields have become an important tool for different cutting-edge applications such as information processing with integer information units. However, even though vectorial singularities naturally form configurations of multiple singular points, up to now only rather simple, mostly cylindrical vector beams ...
Eileen, Otte, Cornelia, Denz
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Tailoring polarization singularities in a Gaussian beam with locally linear polarization

Optics Letters, 2018
Here we theoretically study Gaussian beams with arbitrarily located polarization singularities (PSs). Under PSs, we mean here an isolated intensity null with radial, azimuthal, or radial-azimuthal polarization around it. An expression is obtained for the complex amplitude of such beams.
Alexey A. Kovalev, Victor V. Kotlyar
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Second-harmonic generation of polarization singularities

Optics Letters, 2002
Second-harmonic generation was studied theoretically for the vector singularities (daisy modes) of linearly polarized light and for the elliptic singularities (C points) of elliptically polarized light. Topological charge doubling for C points and daisy modes, similar to that found for vortices, was found.
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Singular Polarizations and Ellipsoid Packings

International Mathematics Research Notices, 2012
We prove in this paper that any 4-dimensional symplectic manifold is essentially made of finitely many symplectic ellipsoids. The key tool is a singular analogue of Donaldson’s symplectic hypersurfaces in irrational symplectic manifolds.
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Tailoring polarization singularity lattices by phase engineering of three-beam interference

Optik, 2022
Sushanta Kumar Pal, Kapil K Gangwar, P Senthilkumaran   +2 more
exaly  

Introduction to polarization singularities

2020
Kedar Khare, Priyanka Lochab, Paramasivam Senthilkumaran   +2 more
openaire   +1 more source

V-point Polarization Singularity Arising from Highly Focused Cylindrical Vector Beams

2021
Rajab Y Ataai
exaly