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Photoconductivity And Grating Response Time Of A Photorefractive Polymer, Brian E. Jones, Stephen Ducharme, Martin M Liphardt, Arosha Goonesekera, James M. Takacs, Lei Zhang, Rajan Athalye
Photoconductivity And Grating Response Time Of A Photorefractive Polymer, Brian E. Jones, Stephen Ducharme, Martin M Liphardt, Arosha Goonesekera, James M. Takacs, Lei Zhang, Rajan Athalye
Stephen Ducharme Publications
We report the photoconductive properties and photorefractive grating response time of a polymer mixture composed of 40-wt. % dissolved diethylamino-benzaldehyde diphenyl hydrazone (DEH) and the non-cross-linking epoxy polymer Bisphenol A 4,4'-nitroaminostilbene. The films have improved photoconductive sensitivities as high as 2.1 × 10–10 cm/(W Ω) at a wavelength of 650 nm with a corresponding reduction of the grating response time constant to 0.11 ± 0.02 s at an intensity of 1 W/cm2. The nitro-aminostilbene chromophore is deduced to be the source of photogenerated charge carriers on the basis of a comparison of the wavelength dependence of the …