Influence of the Glass-Transition Temperature and the Chromophore Content on the Grating Buildup Dynamics of poly(N-vinylcarbazole)-based Photorefractive Polymers.

Applied optics

PubMedID: 18273230

Bittner R, Bräuchle C, Meerholz K. Influence of the Glass-Transition Temperature and the Chromophore Content on the Grating Buildup Dynamics of poly(N-vinylcarbazole)-based Photorefractive Polymers. Appl Opt. 1998;37(14):2843-51.
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.