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Proceedings Paper

Non-local photopolymerization kinetics with multiple termination mechanisms and post-exposure effects
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Paper Abstract

The one-dimensional Non-local Photo-Polymerization Driven Diffusion (NPDD) model, which governs the temporal evolution of holographic grating formation in photopolymers, has been further developed to include all major photochemical processes. These effects include: i) non-steady state kinetics, ii) spatially non-local polymer chain growth, iii) time varying photon absorption, iv) diffusion controlled effects, v) multiple termination mechanisms, vi) inhibition, and vii) post-exposure or dark-reaction effects. The resulting analytic expressions for the monomer and polymer concentrations are then derived and their validity tested against experimental data using a 4-harmonic, numerical fitting regime. The temporal variation in the refractive index modulation is accounted for using the Lorentz- Lorenz relation, and the effects of dark reactions for short holographic exposures are examined for a range of photopolymer materials.

Paper Details

Date Published: 19 May 2009
PDF: 12 pages
Proc. SPIE 7358, Holography: Advances and Modern Trends, 73580O (19 May 2009); doi: 10.1117/12.823401
Show Author Affiliations
Michael R. Gleeson, National Univ. of Ireland, Dublin (Ireland)
Shui Liu, National Univ. of Ireland, Dublin (Ireland)
Dusan Sabol, National Univ. of Ireland, Dublin (Ireland)
John T. Sheridan, National Univ. of Ireland, Dublin (Ireland)

Published in SPIE Proceedings Vol. 7358:
Holography: Advances and Modern Trends
Miroslav Miler; Miroslav Hrabovský, Editor(s)

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