Nanozeolites doped photopolymer layers with reduced shrinkage

Nanozeolites doped photopolymer layers with reduced shrinkage.

An acrylamide based photopolymer doped with pure silica MFI-type zeolite (silicalite-1) nanoparticles has been characterized for holographic recording purposes. The concentrations of the silicalite-1 nanoparticles in the photopolymer layers were 1, 2.5, 5 and 7.5 wt. %. The inclusion of silicalite-1 nanoparticle in the photopolymer has resulted in an increase of the diffraction efficiency by up...

Real-time shrinkage studies in photopolymer films using holographic interferometry

Polymerisation induced shrinkage is one of the main reasons why photopolymer materials are not more widely used for holographic applications. The aim of this study is to evaluate the shrinkage in an acrylamide photopolymer layer during holographic recording using holographic interferometry. Shrinkage in photopolymer layers can be measured by real time capture of holographic interferograms durin...

Study of the shrinkage caused by holographic grating formation in acrylamide based photopolymer film.

We study the shrinkage in acrylamide based photopolymer by measuring the Bragg detuning of transmission diffraction gratings recorded at different slant angles and at different intensities for a range of spatial frequencies. Transmission diffraction gratings of spatial frequencies 500, 1000, 1500 and 2000 lines/mm were recorded in an acrylamide based photopolymer film having 60 ± 5 μm thickness...

Photoluminescence of the GaAs Superlattices with Quasi-Delta-Doped Layers

The GaAs short-period superlattices have been grown for the first time by the metal-organic hydride epitaxy method using Se and C for quasi-doping. Photoluminescence spectra measured at 4.2 K display well-distinguished peaks, which coincide with transitions between quantizied levels of electrons and holes in the potential relief quantum wells. To describe observed phenomena in quasi-doped super...

Titanium doped silicon layers with very high concentration