KCS

Photorefractive (PR) polymers are emerging as promising photonic materials for a variety of applications, such as holographic recording, optical data storage, telecommunications, information processing. For practical application, fast response time and long term phase stability are crucial. Here we attempted to improve these factors. We synthesized PSX-Hz, (poly[4-(diphenylhydrazonomethyl)-phenyl]-[3-(methoxy-dimethyl-silanyl)-propyl]-methyl-amine), as a photoconductive matrix. Photorefractive polymer composite was prepared by mixing PSX-Hz with nonlinear optical chromophore (P-TH-DC), plastisizer (BBP), and TNF. This composite showed maximum diffraction efficiency of 77% and response time of 140 ms at 60V/μm with laser intensity of 60mW/cm². Also we synthesized a multifunctional molecule that possesses photoconductive and electro-optic properties in one molecule as a photorefractive organic glass. Diphenylhydrazone as a photoconductive moiety was covalently bound to the enamine derivative as an electro-optic chromophore via a flexible ester link. The sample prepared from a mixture of the 99 wt % of multifunctional molecule and 1 wt % of fullerene C₆₀ showed good photorefractive properties. The100 μm thick film showed a maximum diffraction efficiency of 69% at a low applied field of 25 V/μm,