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Proceedings Paper

NPDD model: a tool for photopolymer enhancement
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Paper Abstract

The use of theoretical models to represent the photochemical effects present during the formation of spatially and temporally varying index structures in photopolymers, is critical in order to maximise a material's potential. One such model is the Non-local Photo-Polymerization Driven Diffusion (NPDD) model. Upon application of appropriate physical constraints for a given photopolymer material, this model can accurately quantify all major photochemical processes. These include i) non-steady state kinetics, (ii) non-linearity iii) spatially non-local polymer chain growth, iv) time varying primary radical production, v) diffusion controlled effects, vi) multiple termination mechanisms, vii) inhibition, (viii) polymer diffusion and ix) post-exposure effects. In this paper, we examine a number of predictions made by the NPDD model. The model is then applied to an acrylamide/polyvinylalcohol based photopolymer under various recording conditions. The experimentally obtained results are then fit using the NPDD model and key material parameters describing the material's performance are estimated. The ability to obtain such parameters facilitates material optimisation for a given application.

Paper Details

Date Published: 11 May 2011
PDF: 15 pages
Proc. SPIE 8074, Holography: Advances and Modern Trends II, 807407 (11 May 2011); doi: 10.1117/12.898610
Show Author Affiliations
Michael R. Gleeson, National Univ. of Ireland Maynooth (Ireland)
Jinxin Guo, Univ. College Dublin (Ireland)
Shui Liu, Univ. College Dublin (Ireland)
John T. Sheridan, Univ. College Dublin (Ireland)

Published in SPIE Proceedings Vol. 8074:
Holography: Advances and Modern Trends II
Miroslav Hrabovský; Miroslav Miler; John T. Sheridan, Editor(s)

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