Results 21 to 30 of about 7,439 (300)
Near-Field Evolution of Optical Vortices and Their Spatial Ordering behind a Fork-Shaped Grating
Photonics, 2023 Fork-shaped gratings are periodic structures containing a spatial dislocation known to be used for the production of optical vortices in a far field.
Denis A. Ikonnikov +3 more
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Existence of Optical Vortices [PDF]
SIAM Journal on Mathematical Analysis, 2014 17 ...
Yisong Yang, Ruifeng Zhang
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Polarization and topological mode dispersion of optical vortices in circular optical fibers [PDF]
Компьютерная оптика, 2019 In this paper we investigated a problem of intermode dispersion within a group of optical vortices with an azimuthal number greater than or equal to 1 in circular optical fibers.
Elena Barshak +5 more
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Optical vortices in antiguides [PDF]
Optics Letters, 2013 We address the question of whether an optical vortex can be trapped in a dielectric structure with a core of a lower refractive index than the cladding--namely an antiguide. Extensive numerical simulations seem to indicate that this inverse trapping of a vortex is not possible, at least in straightforward implementations.
Marrucci, Lab, Smyth, NFc, Assanto, Gd
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The Mechanism of the Formation of the Spin Hall Effect in a Sharp Focus
Photonics, 2023 We have shown how the spin Hall effect is formed in a tight focus for two light fields with initial linear polarization. We have demonstrated that an even number of local subwavelength regions appear in which the sign of the longitudinal projection of ...
Victor V. Kotlyar +3 more
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2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, 2006 We theoretically and experimentally investigate the self-focusing of optical vortices in Kerr media. We observe collapse to a distinct self-similar profile, which becomes unstable to azimuthal perturbations. We analyze the azimuthal modulational instability for ring-shaped vortices and predict the number of azimuthal maxima solely as a function of ...
Luat T, Vuong +6 more
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Laser Beam Positioning by Using a Broken-Down Optical Vortex Marker
Applied Sciences, 2021 We propose the use of high-order optical vortices as markers in the positioning of a laser beam. The broken optical vortices are arranged in constellations.
Ewa Frączek +2 more
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Evolutions of optical vortices under wide Gaussian background
Results in Physics, 2021 Analytically discussed is the evolution properties of optical vortices superimposed by Gaussian backgrounds. A kind of Tornado-like pattern is obtained after linear propagations, when the Gaussian background is wide enough compared with optical vortices.
Guo Liang +6 more
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Dividing the Topological Charge of a Laguerre–Gaussian Beam by 2 Using an Off-Axis Gaussian Beam
Micromachines, 2022 In optical computing machines, many parameters of light beams can be used as data carriers. If the data are carried by optical vortices, the information can be encoded by the vortex topological charge (TC).
Alexey A. Kovalev +3 more
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Longitudinal component of the Poynting vector of a tightly focused optical vortex with circular polarization [PDF]
Компьютерная оптика, 2018 We numerically investigated the focusing of optical vortices with the wavelength λ = 532 nm and right-hand circular polarization by using a diffractive lens with the numerical aperture NA = 0.95.
Sergey Stafeev, Anton Nalimov
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