Results 11 to 20 of about 40,586 (284)
Sharp Focusing of a Hybrid Vector Beam with a Polarization Singularity
Photonics, 2021 The key result of this work is the use of the global characteristics of the polarization singularities of the entire beam as a whole, rather than the analysis of local polarization, Stokes and Poincare–Hopf indices.
Victor V. Kotlyar +2 more
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Sharp focusing of beams with V-point polarization singularities
Компьютерная оптика, 2021 It is theoretically and numerically shown that when tightly focusing an n-th order vector light field that has the central V-point (at which the linear polarization direction is undetermined), the polarization singularity index n, and a "flower"-shaped ...
V.V. Kotlyar +3 more
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Extremize Optical Chiralities through Polarization Singularities [PDF]
Physical Review Letters, 2021 Several mislabellings in v1 are corrected, with Supplemental Material also ...
Weijin Chen +3 more
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Configuring Polarization Singularity Array Composed of C-Point Pairs
IEEE Photonics Journal, 2022 The generation and topological configuration of double-layered polarization singularity array (PSA) having paired C-points of opposite topological index through superposing three Laguerre-Gaussian (LG) component beams with orthogonal linear polarization ...
Xinglin Wang +8 more
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Polarization singularities of focused, radially polarized fields [PDF]
Frontiers in Optics, 2006 The state of polarization of strongly focused, radially polarized electromagnetic fields is examined. It is found that several types of polarization singularities exist. Their relationship is investigated, and it is demonstrated that on smoothly varying a system parameter, such as the aperture angle of the lens, different polarization singularities can
Schoonover, R. W., Visser, T.D.
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Comparison of focusing of short pulses in the Debye approximation [PDF]
Компьютерная оптика, 2018 We have examined different types of pulses and features of their frequency spectra. Calculations have shown that a significant distinction between the pulses only takes place at a very short pulse duration (shorter than the oscillation period).
Svetlana Khonina +2 more
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Evolution of coherence singularities in polarization singular beams
Applied Optics, 2023 The evolution of correlation singularities in partially coherent polarization singular beams (PC-PSBs) is investigated. Since PSBs are the superposition of two orthogonally polarized vortex beams, the occurrence of coherence singularities in PC-PSBs is strongly governed by the topological charge of the component vortex beams and the spatial coherence ...
Stuti Joshi +2 more
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Singularities of Partially Polarized Vortex Beams [PDF]
Frontiers in Physics, 2020 In this paper we look at three ways to define singularities in a partially coherent electromagnetic beam with non-uniform polarization. A simple model of such a beam is developed to highlight features of such singularities.
William Scott Raburn, Greg Gbur
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Polarization singularities from unfolding an optical vortex through a birefringent crystal [PDF]
, 2005 Optical vortices (nodal lines and phase singularities) are the generic singularities of scalar optics but are unstable in vector optics. We investigate experimentally and theoretically the unfolding of a uniformly polarized optical vortex beam on ...
Dennis, Mark R. +3 more
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Fresnel and Fraunhofer diffraction of a Gaussian beam with several polarization singularities [PDF]
Компьютерная оптика, 2018 Alongside phase singularities (optical vortices), there may be light fields with polarization singularities (PS), i.e. isolated intensity nulls with radial, azimuthal, or radial-azimuthal polarization around them.
Alexey Kovalev, Victor Kotlyar
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