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Proceedings Paper

Role of the polymer viscoelasticity on the orientational processes of chromophores and on the photorefractive performances in low-Tg-doped polymers
Author(s): Jean-Charles Ribierre; Loic Mager; Alain F. Fort; Stephane Mery
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Paper Abstract

The dynamics of the photorefractive properties in low glass transition temperature (Tg) doped polymers essentially depend on the photoconductivity of the host and on the orientational dynamics of nonlinear optical chromophores imbedded in the matrix. A high rotational mobility of push-pull chromophores is required to observe the so-called orientational enhancement. The influence of Tg on the photorefractive performances of guest-host polymers has been previously pointed out. However, the effects of the viscoelastic properties of polymers on the orientational processes of chromophores are neglected in most of the studies devoted to the optimization of photorefractive dynamics. In the present work, the orientational dynamics of chromophores are investigated by dielectric spectroscopy and ellipsometric dynamical measurements in various low Tg doped polymers. The experimental results show the role of different physical parameters (temperature, applied electric field magnitude, amount of plasticizer, average molecular weight of polymer) on the rotational mobility of chromophores. These data underline the necessity to take into account the viscoelastic behavior to improve the dynamics of photorefractive polymers.

Paper Details

Date Published: 5 November 2002
PDF: 11 pages
Proc. SPIE 4802, Organic Photorefractive and Photosensitive Materials for Holographic Applications, (5 November 2002); doi: 10.1117/12.452450
Show Author Affiliations
Jean-Charles Ribierre, Institut de Physique et Chimie des Matériaux de Strasbourg (France)
Loic Mager, Institut de Physique et Chimie des Matériaux de Strasbourg (France)
Alain F. Fort, Institut de Physique et Chimie des Matériaux de Strasbourg (France)
Stephane Mery, Institut de Physique et Chimie des Matériaux de Strasbourg (France)


Published in SPIE Proceedings Vol. 4802:
Organic Photorefractive and Photosensitive Materials for Holographic Applications
Klaus Meerholz, Editor(s)

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