In optimizing the performance of organic photorefractive (PR) materials, the glass transition temperature Tg is an important factor, according to the investigation reported here. The influence of Tg on the steady-state performance of four series of PR polymer composites at room temperature with chromophore content ρchr ranging from 20 to 50 wt.-% has been studied. The performance optimum found for highly doped materials with Tg approximately equal to room temperature is demonstrated to be a result of several counteracting effects. Organic PR materials are highly promising for holographic applications.
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Bittner et al. (1999) studied this question.