Results 11 to 20 of about 1,160,454 (280)
Polarization singularity anisotropy: determining monstardom. [PDF]
Optics Letters, 2008 C points, that is, isolated points of circular polarization in transverse fields of varying polarization, are classified morphologically into three distinct types known as lemons, stars, and monstars.
Mark R. Dennis
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Topological polarization singularities in metaphotonics [PDF]
Nanophotonics, 2021 Polarization singularities of vectorial electromagnetic fields locate at the positions where properties of polarization ellipses are not defined. First observed for conical diffraction in 1830s, polarization singularities have been studied systematically
Liu Wenzhe +3 more
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Extremize Optical Chiralities through Polarization Singularities. [PDF]
Physical Review Letters, 2021 Chiral optical effects are generally quantified along some specific incident directions of exciting waves (especially for extrinsic chiralities of achiral structures) or defined as direction-independent properties by averaging the responses among all ...
Weijin Chen +3 more
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Phase Singularities to Polarization Singularities [PDF]
International Journal of Optics, 2020 Polarization singularities are superpositions of orbital angular momentum (OAM) states in orthogonal circular polarization basis. The intrinsic OAM of light beams arises due to the helical wavefronts of phase singularities. In phase singularities, circulating phase gradients and, in polarization singularities, circulating ϕ12 Stokes phase gradients are
null Ruchi +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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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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