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.
© 1998 Optical Society of America
Original Manuscript: August 25, 1997
Revised Manuscript: February 9, 1998
Published: May 10, 1998
Reinhard Bittner, Christoph Bräuchle, and Klaus Meerholz, "Influence of the glass-transition temperature and the chromophore content on the grating buildup dynamics of poly(N-vinylcarbazole)-based photorefractive polymers," Appl. Opt. 37, 2843-2851 (1998)