Role of the polymer viscoelasticity on the orientational processes of chromophores and on the photorefractive performances in low Tg doped polymers

Jean Charles Maurice Ribierre, Loïc Mager, Alain Fort, Stéphane Méry

Research output: Contribution to journalConference article

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.

Original languageEnglish
Pages (from-to)103-113
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4802
DOIs
Publication statusPublished - Dec 1 2002
EventOrganic Photofefractive and Photosensitive Materials for Holographic Applications - Seattle, WA, United States
Duration: Jul 9 2002 → …

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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