title: Influence of the Glass-Transition Temperature and the Chromophore Content on the Grating Buildup Dynamics of poly(N-vinylcarbazole)-based Photorefractive Polymers.
abstract: The influence of the glass-transition temperature T(g) and the electro-optical chromophore content on the grating buildup dynamics in photorefractive polymer composites is investigated. The response times were found to be strongly dependent on both parameters. In the low-T(g) regime, composites of different chromophore content respond similarly quickly (200-500 ms), whereas significant differences occur for T(g) above the measurement (room) temperature. The composites with the highest chromophore content give the best steady-state performance; however, their response is much slower than that for those containing less chromophore.
authors.forename: R
authors.initials: R
authors.lastname: Bittner
authors.forename: C
authors.initials: C
authors.lastname: Bräuchle
authors.forename: K
authors.initials: K
authors.lastname: Meerholz