Results 261 to 270 of about 1,200,672 (302)

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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Dynamic Control of Polarization Singularities in Momentum Space by a Hybrid Photonic System

Laser & Photonics Reviews
Dynamic control of polarization singularities, including bound states in the continuum (BICs) and circularly polarized points (C points), provides significant potential for engineering far‐field polarization textures and chiral light‐matter interactions.
Qing-an Tu, Hongxin Zhou, Chunlin Ji, Ruopeng Liu, Yan Meng, Maohua Gong, Zhen Gao   +6 more
semanticscholar   +1 more source

Emergent polarization singularities

Optics Letters, 2004
Polarization singularities are shown to emerge spontaneously from the incoherent addition of uncorrelated optical fields that individually need not contain singularities. Examples of this phenomenon are given for both vector and ellipse fields. The incoherent addition of vector fields whose singularities have integer winding numbers is shown to yield ...
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Polychromatic polarization singularities

Optics Letters, 2003
Elliptical polarization can appear in only monochromatic optical fields. In polychromatic vector fields the polarization is a Lissajous figure, but in only commensurate fields do the figures have well-defined shapes; in other fields the shapes are undefined.
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Dual-Band Polarization Control with Pairwise Positioning of Polarization Singularities in Metasurfaces.

Physical Review Letters
Emerging applications of metasurfaces in classical and quantum optics are driving the need for precise polarization control of nearly-degenerate, high quality (Q)-factor modes. However, current approaches to creating specifically polarized pairs of modes
Chloe F. Doiron, Igal Brener, Alexander Cerjan   +2 more
semanticscholar   +1 more source

Non-interferometric technique to realize vector beams embedded with polarization singularities.

Journal of The Optical Society of America A-optics Image Science and Vision, 2020
In this paper, we present a simple and flexible non-interferometric method to generate various polarization singularity lattice fields. The proposed method is based on a double modulation technique that uses a single reflective spatial light modulator to
Praveen Kumar, S. Pal, N. Nishchal, P. Senthilkumaran   +3 more
semanticscholar   +1 more source

Singular points of the polarization tensor

Solar Physics, 1996
The problem to compute the magnetic field above the chromosphere using data of the vector τ = B t /B t that gives the projected field direction can be solved with different approximations. The field of direction vectors τ is, however, not the only field accessible to observations. The Stokes parameters, which are components of the radiation tensor, can
M. M. Molodensky, L. I. Starkova
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Correlation and polarization singularities of a radially polarized Gaussian Schell-model vortex beam propagating in oceanic turbulence.

Journal of The Optical Society of America A-optics Image Science and Vision
The correlation and polarization singularities as the important parameters of a radially polarized Gaussian Schell-model vortex beam propagating in oceanic turbulence have been investigated in detail.
Qian Xu, Yonggen Xu, Wenli Liu, Liangliang Zhao   +3 more
semanticscholar   +1 more source

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,
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Polarization filter with singular value decomposition

GEOPHYSICS, 2001
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). The filter is the sum of the first two eigenimages of the SVD on the signal matrix.
De Franco R, Musacchio G
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