Results 31 to 40 of about 2,371 (296)
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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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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Frontiers in Physics, 2021 We report on the effects associated with photonic nanojet (PNJ) formation under illumination of a metallic spherical particle with a focused light beam with polarization singularity.
D. O. Plutenko, M. V. Vasnetsov
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Vector Beams with Only Transverse Intensity at Focus
Applied Sciences, 2023 In this work, the tight focusing of vector beams with azimuthal polarization and beams with a V-line of polarization singularity (sector azimuthal polarization) was simulated numerically using the Richards–Wolf formulas.
Sergey S. Stafeev +4 more
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Nondiffractive three-dimensional polarization features of optical vortex beams [PDF]
, 2023 Vector optical vortices exhibit complex polarization patterns due to the interplay between spin and orbital angular momenta. Here we demonstrate, both analytically and with simulations, that certain polarization features of optical vortex beams maintain ...
Zayats, Anatoly +3 more
core +1 more source
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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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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Spin angular momentum of Gaussian beams with several polarization singularities
Компьютерная оптика, 2023 We study a paraxial vector Gaussian beam with several polarization singularities located on a circle. Such a beam is superposition of a cylindrically polarized Laguerre-Gaussian beam and a linearly polarized Gaussian beam.
A.A. Kovalev, V.V. Kotlyar
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Matter Accretion Versus Semiclassical Bounce in Schwarzschild Interior
Universe, 2020 We discuss the properties of the previously constructed model of a Schwarzschild black hole interior where the singularity is replaced by a regular bounce, ultimately leading to a white hole.
Kirill Bronnikov +2 more
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Ways to achieve efficient non-local vortex beam generation
Nanophotonics, 2021 Based on the insights into the phenomenon of bound states in the continuum, a novel approach utilizing the momentum-space polarization morphologies of periodic structures to generate vortex beams (VBs) has been proposed. Such periodic structures modulate
Liu Wenzhe +3 more
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