Results 11 to 20 of about 86,685 (296)
Sharp scattering threshold for the cubic-quintic NLS in the focusing-focusing regime
Journal of Functional Analysis, 2021 Accepted by Journal of Functional ...
Luo, Yongming
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Adiabatic nano-focusing of plasmons by sharp metallic wedges [PDF]
Applied Physics B, 2006 In this paper, we demonstrate the possibility of efficient adiabatic nano-focusing of plasmons by a sharp triangular metal wedge. The geometrical optics approach and the approximation of continuous electrodynamics are used for the analysis. In particular, it is demonstrated that both the phase and group velocities of an incident anti-symmetric (with ...
Gramotnev, Dmitri, Vernon, Kristy
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Circular polarization before and after the sharp focus for linearly polarized light
Компьютерная оптика, 2022 We consider sharp focusing of a linearly polarized light beam. Using the Richards-Wolf formalism, we show that before and after the focal plane there are cross-section regions in which the polarization is circular (elliptical).
S.S. Stafeev, V.D. Zaitsev, V.V. Kotlyar
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Sharp focusing of a light field with polarization and phase singularities of an arbitrary order [PDF]
Компьютерная оптика, 2019 Using the Richards-Wolf formalism, we obtain general expressions for all components of the electric and magnetic strength vectors near the sharp focus of an optical vortex with the topological charge m and nth-order azimuthal polarization.
Victor Kotlyar +2 more
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Компьютерная оптика, 2023 In this work, the sharp focusing of a laser beam whose initial polarization pattern is formed by superposition of a cylindrical mth-order vector beam and a homogeneous linearly polarized beam is considered theoretically and numerically.
V.V. Kotlyar, S.S. Stafeev, V.D. Zaitsev
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Компьютерная оптика, 2023 Features of the near-field diffraction of Gaussian beams and Laguerre-Gauss modes by silicon subwavelength optical elements with varying relief height were studied in this paper using a finite-difference time-domain method.
D.A. Savelyev
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Focusing of inhomogeneous polarized modes of a laser waveguide dielectric resonator [PDF]
Радиофизика и электроника, 2020 Subject and Purpose. In this paper, spatial power characteristics of laser beams with inhomogeneous spatial polarization are theoretically investigated depending on whether they have moderate or sharp focusing.
A.V. Degtyarev +3 more
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Calculation of the intensity at the sharp focus of a cylindrical vector beam by three methods
Компьютерная оптика, 2023 We conduct a comparative analysis of diffraction fields upon sharply focusing vortex and non-vortex incident beams, calculated using three non-paraxial methods. The methods employed are a finite difference time domain (FDTD) method, a Rayleigh–Sommerfeld
A.G. Nalimov +2 more
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Digital holographic microscopy and focusing methods based on image sharpness [PDF]
Journal of Microscopy, 2014 SummaryDigital holographic microscope allows imaging of opaque and transparent specimens without staining. A digitally recorded hologram must be reconstructed numerically at the actual depth of the object to obtain a focused image. We have developed a high‐resolution digital holographic microscope for imaging amplitude and phase objects with ...
İlhan, Hazar Aytekin +2 more
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Spin angular momentum density in the tight focus of a light field with phase and polarization singularities [PDF]
Компьютерная оптика, 2019 For a light field with both phase and polarization singularities at its center, expressions are obtained that describe the distribution of the spin angular momentum (SAM) density in the sharp focal spot of an aplanatic system.
Alexey Kovalev +2 more
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