Results 261 to 270 of about 1,160,454 (280)

Singular polarization eigenstates in anisotropic stratified structures

Applied Optics, 2000
A new optical element that displays singular polarization eigenstates is proposed. It consists of a planar stratified structure composed of alternate gyrotropic and birefringent layers. The orthogonality of the polarization eigenstates is lost because of anisotropic reflections at the interfaces, which are enhanced by the special condition chosen for ...
L C, Meira-Belo, U A, Leião
openaire   +2 more sources

Knotting fractional-order knots with the polarization state of light

Nature Photonics, 2018
The fundamental polarization singularities of monochromatic light are normally associated with invariance under coordinated rotations: symmetry operations that rotate the spatial dependence of an electromagnetic field by an angle θ and its polarization ...
E. Pisanty, Gerard J. Machado, Verónica Vicuña-Hernández, A. Picón, A. Celi, J. Torres, M. Lewenstein   +6 more
semanticscholar   +1 more source

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.
openaire   +1 more source

Topological polarization singular enables multiple-system excellent circular dichroism via chiral bound states in the continuum with all-dielectric metasurfaces

Applied Physics Letters
The advancements in chiroptics have propelled applications beyond traditional optics, expanding its reach into domains such as heat and fluid mechanics.
Shu Zong, Jiafei Chen, Shijie Cai, Xiaoshan Liu, Guiqiang Liu, Jing Chen, Chaojun Tang, Wei Du, Zheng-qi Liu   +8 more
semanticscholar   +1 more source

Synthesizing polarization singularity lattices using phase ramps

Journal of the Optical Society of America A
In this paper, a novel methodology for generating polarization singularity lattices using ramp phase structures in a polarization interferometer is presented. By applying differential tilts to distinct regions within the wavefront using a spatial light modulator, a phase-discontinuity line separating the two regions is formed.
Kapil K. Gangwar, Sarvesh Bansal, P. Senthilkumaran   +2 more
openaire   +2 more sources

Energy backflow in the focus of a light beam with phase or polarization singularity

Physical Review A, 2019
V. Kotlyar, S. Stafeev, A. Nalimov
semanticscholar   +1 more source

Polarization singularity index sign inversion by a half-wave plate.

Applied Optics, 2017
S. Pal, Ruchi, P. Senthilkumaran
semanticscholar   +1 more source

Polarization Singularity Explosions in Tailored Light Fields

, 2018
E. Otte, C. Alpmann, C. Denz
semanticscholar   +1 more source

Introduction to polarization singularities

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

Numerical generation of a polarization singularity array with modulated amplitude and phase.

Journal of The Optical Society of America A-optics Image Science and Vision, 2016
Dong Ye, Xinyu Peng, Qi Zhao, Yan-ru Chen   +3 more
semanticscholar   +1 more source