Results 1 to 10 of about 133,733 (246)
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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Photonics, 2023 Diffractive optical elements (DOEs) fundamentally provide the possibility to simultaneously utilize multiple orders for different imaging functions within a system.
Lia Schmidt +2 more
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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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Efficient diffractive phase optics for electrons [PDF]
New Journal of Physics, 2014 Electron diffraction gratings can be used to imprint well-defined phase structure onto an electron beam. For example, diffraction gratings have been used to prepare electron beams with unique phase dislocations, such as electron vortex beams, which hold promise for the development of new imaging and spectroscopy techniques for the study of materials ...
Tyler R Harvey +5 more
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Optimization of parameters of multilayer diffraction gratings using needle variations
Известия высших учебных заведений. Поволжский регион: Физико-математические науки, 2022 Background. The purpose of the work is to optimize the diffraction efficiency in the first diffraction order of a multilayer diffraction grating. Material and methods. Needle variations are used to optimize diffraction efficiency.
V.Yu. Martynova +2 more
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Diffraction efficiency of strong volume holograms [PDF]
Optics Letters, 1990 We investigate the diffraction efficiency of strong volume holograms in which the coupling parameter is several times that needed for maximum diffraction efficiency. We discuss the implications of our findings on photorefractive implementations of various neural network systems.
J H, Hong, P, Yeh, D, Psaltis, D, Brady
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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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Spectral and angular dependence of the efficiency of a two-layer and single-relief sawtooth microstructure [PDF]
Компьютерная оптика, 2018 Spectral and angular dependences of the diffraction efficiency of two-layer single-relief sawtooth microstructures are analyzed. The microstructures are assembled from optical plastics and new brands of special optical glass.
Grigoriy Greisukh +4 more
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Gels, 2023 The role of volume hydrogel holographic gratings as optical transducers in sensor devices for point-of-care applications is increasing due to their ability to be functionalized for achieving enhanced selectivity.
Paola Zezza +4 more
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Photonics, 2023 In this study, novel recommendations are presented and substantiated for selecting the number of modes and optical thicknesses of flat lattice slabs that make up microreliefs, which minimize the computational complexity of the rigorous coupled-wave ...
Grigoriy I. Greisukh +4 more
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