Photorefractive Polymer System with a Low Glass Transition Temperature for a Holographic Recording

The photorefractive polymeric composite with good performance was prepared. The carbazole-substituted polysiloxane sensitized by 2,4,7-trinitro-9-fluorenone was used as a photoconducting medium and 1-[4-(2-nitrovinyl)phenyl]piperidine was added as an optically nonlinear chromophore. The photorefractive property of polymer was determined by diffraction efficiency using a 100 µm-thick film. The maximum diffraction efficiency (ηmax) of 71 % was obtained at the electric field of 70 V/µm. The potential of the current polymer material as a holographic recording medium was evaluated by the demonstration of holographic recording and subsequent reading of optical image