Results 11 to 20 of about 390,346 (343)
Crystals, 2022 We present a process flow for wafer-scale fabrication of a surface phase grating with sub-micron feature sizes from a single semiconductor material. We demonstrate this technique using a 110-oriented GaP semiconductor wafer with second-order nonlinearity
Mohammad Bashirpour +3 more
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Nanomaterials, 2022 Diffraction gratings are becoming increasingly widespread in optical applications, notably in lasers. This study presents the work on the characterization and evaluation of Multilayer Dielectric Diffraction Gratings (MDG) based on the finite element ...
Duy Thanh Cu +5 more
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Design and Fabrication of Silicon-Blazed Gratings for Near-Infrared Scanning Grating Micromirror
Micromachines, 2022 Blazed gratings are the critical dispersion elements in spectral analysis instruments, whose performance depends on structural parameters and topography of the grating groove.
Sinong Zha +4 more
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Highly Efficient Double-Layer Diffraction Microstructures Based on New Plastics and Molded Glasses
Photonics, 2021 Within the framework of rigorous diffraction theory, the maximum possible incidence angles of radiation on two-layer sawtooth relief-phase microstructures in the visible (0.4 ≤ λ ≤ 0.7 μm) spectral range are compared.
Grigoriy I. Greisukh +4 more
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Design of Semiconductor Contact Grating Terahertz Source with Enhanced Diffraction Efficiency
Crystals, 2022 We report a semiconductor contact grating terahertz source design based on a rectangular profile for phase-matched terahertz generation in the long infrared pump wavelength range. The calculations show that the best diffraction efficiency can be achieved
Zoltán Tibai +4 more
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Broadband and Efficient Diffraction [PDF]
Advanced Optical Materials, 2013 Surface topography dictates the deterministic functionality of diffraction by a surface. In order to maximize the efficiency with which a diffractive optical component, such as a grating or a diffractive lens, directs light into a chosen order of diffraction, it is necessary that it be "blazed".
Ribot, Céline +8 more
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Approaches to the algorithmization of the rigorous coupled-wave analysis [PDF]
Компьютерная оптика, 2019 Coefficients required for the algorithmization and implementation of the rigorous coupled-waves analysis are derived for a Fourier series expansion of the permittivity of a linear-sawtooth relief with positive tangent of the working surface angle and ...
Artyom Antonov +2 more
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Regimes of atomic diffraction: Raman versus Bragg diffraction in retroreflective geometries [PDF]
, 2020 We provide a comprehensive study of atomic Raman and Bragg diffraction when coupling to a pair of counterpropagating light gratings (double diffraction) or to a single one (single diffraction) and discuss the transition from one case to the other in a ...
Abend, Sven +6 more
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Crystals, 2020 A series of photopolymers based on ethylene glycol phenyl ethyl arylate (EGPEA) monomers and poly(methyl methacrylate) (PMMA) matrix with varying initiator concentrations and sample thicknesses have been synthesized and their optical performance ...
Fang-Yong Lee +3 more
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Encoding of efficient diffractive microlenses [PDF]
Optics Letters, 1995 Different coding schemes for diffractive multilevel microlenses are compared. A simple method to code a lens to get the optimum diffraction efficiency is given. Furthermore, a straightforward way to estimate the achievable efficiency of a lens is presented.
Kuittinen, Markku, Herzig, Hans-Peter
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