Results 11 to 20 of about 4,307 (260)
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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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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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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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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The curious arithmetic of optical vortices [PDF]
Optics Letters, 2000 The superposition of noncoaxial light beams containing screw wave-front dislocations is shown to create light patterns with a richer vortex content than that given by the arithmetic of the topological charges of the individual beams. We report the experimental observation of this phenomenon.
Molina Terriza, Gabriel +2 more
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Optical vortices enabled by structural vortices
, 2023 The structural symmetry of solids plays an important role in defining their linear and nonlinear optical properties. The quest for versatile, cost-effective, large-scale, and defect-free approaches and materials platforms for tailoring structural and optical properties on demand has been underway for decades.
Liu, Yuanfeng +9 more
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Symmetry and Quantum Features in Optical Vortices [PDF]
Symmetry, 2021 Optical vortices are beams of laser light with screw symmetry in their wavefront. With a corresponding azimuthal dependence in optical phase, they convey orbital angular momentum, and their methods of production and applications have become one of the most rapidly accelerating areas in optical physics and technology.
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