Fast response photorefractive guest-host polymer composite

A film of composite poly( N-vinylzarbazole): [[4-(dodecanecylmethylamino) p henyl] methylene]-propanedinitrile: C-60 was proven to possess attractive p hotorefractive properties with fast response time. The diffraction efficien cy was fitted to the square of a biexponential formula and the fast respons e time was deduced to be 12 ms at an erasing beam intensity of 1 W/cm(2). M eanwhile, the strong photorefractive effect was maintained. An amplitude of index grating as large as 3.1 x 10(3) at an electric field of 78 V/mum and fitted a two-beam coupling gain coefficient of 43 cm(1) at 57 V/mum were o bserved.