Extended model of the photoinitiation mechanisms in photopolymer materials

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Title: Extended model of the photoinitiation mechanisms in photopolymer materials
Authors: Liu, Shui
Gleeson, M. R.
Sabol, Dušan
Sheridan, John T.
Permanent link: http://hdl.handle.net/10197/3414
Date: Nov-2009
Abstract: In order to further improve photopolymer materials for applications such as data storage, a deeper understanding of the photochemical mechanisms which are present during the formation of holographic gratings has become ever more crucial. This is especially true of the photoinitiation processes, since holographic data storage requires multiple sequential short exposures. Previously, models describing the temporal variation in the photosensitizer (dye)concentration as a function of exposure have been presented and applied to two different types of photosensitizer, i.e., Methylene Blue and Erythrosine B, in a polyvinyl alcohol/acrylamide based photopolymer. These models include the effects of photosensitizer recovery and bleaching under certain limiting conditions. In this paper, based on a detailed study of the photochemical reactions, the previous models are further developed to more physically represent these effects. This enables a more accurate description of the time varying dye absorption, recovery, and bleaching, and therefore of the generation of primary radicals in photopolymers containing such dyes.
Funding Details: Science Foundation Ireland
Irish Research Council for Science, Engineering and Technology
Other funder
Type of material: Journal Article
Publisher: American Institute of Physics
Copyright (published version): 2009 American Institute of Physics
Subject LCSH: Photochemistry
Photopolymers
Holographic storage devices (Computer science)
Photosensitizing compounds
DOI: 10.1063/1.3262586
Language: en
Status of Item: Not peer reviewed
Appears in Collections:Electrical and Electronic Engineering Research Collection

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