Results 21 to 30 of about 11,755 (309)
Polarization insensitive blazed diffraction gratings [PDF]
Journal 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
Band-edge-induced Bragg diffraction in two-dimensional photonic crystals [PDF]
, 2006 Two-dimensional photonic crystals composed of two orthogonal volume diffraction gratings have been photogenerated in photopolymers. When the read beam is set at the Bragg angle, the diffraction efficiency of the transmission grating is strongly enhanced ...
He, Qiong +5 more
core +1 more source
Electrically tunable, optically induced dynamic and permanent gratings in dye-doped liquid crystals [PDF]
, 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]
EPJ 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
Monomer diffusion rates in photopolymer material. Part I. Low spatial frequency holographic gratings [PDF]
, 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 +2 more sources
Optimization of neutron diffraction from phase-gratings [PDF]
, 2018 The recent development of phase-grating moir\'e neutron interferometry promises a wide range of impactful experiments from dark-field imaging of material microstructure to precise measurements of fundamental constants.
H. Wen (9002213) +8 more
core +1 more source
Study of the dynamic formation of transmission gratings recorded in photopolymers and holographic polymer-dispersed liquid crystals [PDF]
, 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
Tailorable Elastomeric Grating With Tunable Groove Density Gradient
IEEE 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