The polymer composites under investigation consist of the hole-transporting polymer poly(N-vinylcarbazole) (PVK), the charge generating molecule 2,4,7-trinitro-9-fluorenone (TNF), the plasticizer 1,3-bis(N-carbazolyl) propane (BisCzPro), and nonlinear optical (NLO) chromophore. We carried out a series of measurements in order to characterize the photorefractive polymers: transmission spectrum; glass transition temperature T/sub g/; speed of reorientation under the application of an electric field of 54 V//spl mu/m and birefringence induced by the applied field using a polarimetric technique; photorefractive diffraction efficiency and response time as a function of incident intensity using a four-wave mixing geometry; and photorefractive gain coefficient and the photorefractive phase shift using a two-wave mixing geometry. We have successfully accelerated the response of NLO chromophores by modifying the structure of DNMAA without any degradation of diffraction efficiency. The photorefractive response of our samples is limited by the formation of space charge distribution.
High-speed PVK-based photorefractive polymer composites
The 15th Annual Meeting of the IEEE Lasers and Electro-Optics Society ; 2 ; 596-597 vol.2
2002-01-01
104568 byte
Conference paper
Electronic Resource
English
WDD2 High-Speed PVK-based Photorefractive Polymer Composites
British Library Conference Proceedings | 2002
|High-speed compact photorefractive joint transform correlator [3466-15]
British Library Conference Proceedings | 1998
|