Fast response photorefractive guest-host polymer composite

摘要

A film of composite poly(N-vinylzarbazole): [[4-(dodecanecyl-methylamino) phenyl]methylene]-propanedinitrile: C_(60) was proven to possess attractive photorefractive properties with fast response time. The diffraction efficiency was fitted to the square of a biexponential formula and the fast response time was deduced to be 12 ms at an erasing beam intensity of 1W/cm~2. Meanwhile, the strong photorefractive effect was maintained. An amplitude of index grating as large as 3.1 * 10~(-3) at an electric field of 78V/μm and fitted a two-beam coupling gain coefficient of 43 cm~(-1) at 57V/μm were observed.