17 September 2002 Optimization of the efficiencies of photorefractive polymers: correlations between visoelastic properties and electro-optical responses
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Abstract
The photorefractive properties of low glass transition temperature (Tg) doped polymers are essentially ruled by the ability of the push-pull chromophores to align along the electric field. Therefore,a high rotational mobility is therefore needed for these non linear optical chromophores incorporated in the matrix. However, even if the influence of Tg on the photorefractive performances of guest-host polymers has been previously pointed out, this unique parameter is not sufficient to take into account the viscoelastic properties of the matrices. A complete study of the orientational dynamics of chromophores in various low Tg doped polymers, investigated by dielectric spectroscopy, second harmonic generation and electrooptical dynamical measurements, is presented. The results are fully interpreted and modeled by rheologic laws used to describe the viscoelastic behavior of polymers. Finally, the influence of the average molecular weight is also analyzed and then demonstrates the interest of using low molecular weight polymers.
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Jean-Charles Ribierre, Jean-Charles Ribierre, Loic Mager, Loic Mager, Stephane Mery, Stephane Mery, Alain F. Fort, Alain F. Fort, } "Optimization of the efficiencies of photorefractive polymers: correlations between visoelastic properties and electro-optical responses", Proc. SPIE 4918, Materials, Devices, and Systems for Display and Lighting, (17 September 2002); doi: 10.1117/12.483059; https://doi.org/10.1117/12.483059
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