Results 31 to 40 of about 2,070,111 (343)

Polarization insensitive blazed diffraction gratings [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2006
Gratings insensitive to light polarization may be useful in many areas of optical engineering, particularly in light demultiplexing application. We study different kinds of binary gratings able to present reflected efficiencies higher than 98% in the ...
Bonod Nicolas   +3 more
doaj   +1 more source

Electrically tunable, optically induced dynamic and permanent gratings in dye-doped liquid crystals [PDF]

open access: yes, 2002
We report on further experimental studies of the ac field response of transient and permanent gratings written with visible light in both planar and homeotropic, dye-doped liquid crystal cells.
Cudney, Roger S.   +3 more
core   +1 more source

Resonant diffraction gratings with polarization-dependent efficiencies [PDF]

open access: yesEPJ Web of Conferences, 2020
Subwavelength-structures with different fill factors in the lateral dimensions result in unique phase shifts for the different polarization states of transmitted light. By using this additional degree of freedom for diffractive optical elements, we yield
Wüster Julian   +3 more
doaj   +1 more source

Fabrication of diamond diffraction gratings for experiments with intense hard x-rays [PDF]

open access: yes, 2017
The demands on optical components to tolerate high radiation dose and manipulate hard x-ray beams that can fit the experiment requirements, are constantly increasing due to the advancements in the available x-ray sources.
M. Makita   +5 more
semanticscholar   +1 more source

Monomer diffusion rates in photopolymer material. Part I. Low spatial frequency holographic gratings [PDF]

open access: yes, 2011
For photopolymers, knowing the rate of diffusion of the active monomer is important when modeling the material evolution during recording in order to understand and optimize their performance.
Close, Ciara E.   +8 more
core   +1 more source

Tailorable Elastomeric Grating With Tunable Groove Density Gradient

open access: yesIEEE Photonics Journal, 2017
This paper describes a new method for fabrication of tailorable elastomeric gratings with tunable groove density gradients based on stretching of the grating sample in a direction perpendicular to the grating line within the grating surface.
Bin Sheng   +6 more
doaj   +1 more source

Study of the dynamic formation of transmission gratings recorded in photopolymers and holographic polymer-dispersed liquid crystals [PDF]

open access: yes, 2004
Local and nonlocal models for the diffusion of photopolymers are applied to the dynamic formation of transmission gratings recorded in photopolymers and holographic polymer-dispersed liquid crystals (H-PDLCs). We retrieve the main parameters of H-PDLCs (
Kaiser, Jean-Luc   +5 more
core   +1 more source

Haze and light diffraction of dielectric line-gratings

open access: yes, 2023
The optical characterization of dielectric periodic line-gratings for which the period of the grating is significantly larger than the probing wavelength is investigated experimentally, numerically, and analytically.
Colette Turbil (14357841)   +3 more
core   +1 more source

Formation of high-order acoustic Bessel beams by spiral diffraction gratings. [PDF]

open access: yesPhysical Review E, 2016
The formation of high-order Bessel beams by a passive acoustic device consisting of an Archimedes' spiral diffraction grating is theoretically, numerically, and experimentally reported in this paper. These beams are propagation-invariant solutions of the
N. Jiménez   +5 more
semanticscholar   +1 more source

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