Photorefractive properties of TNFM-sensitized PVK-based polymer composites and fully functionalized polymethacrylates

Eric Hendrickx; David Van Steenwinckel; Christiaan Engels; Elke Gubbelmans; Kurt Van Den Broeck; David Beljonne; Jean-Luc Bredas; Celest Samyn; Andre P. Persoons

doi:10.1117/12.406477

13 November 2000 Photorefractive properties of TNFM-sensitized PVK-based polymer composites and fully functionalized polymethacrylates

Eric Hendrickx, David Van Steenwinckel, Christiaan Engels, Elke Gubbelmans, Kurt Van Den Broeck, David Beljonne, Jean-Luc Bredas, Celest Samyn, Andre P. Persoons

Author Affiliations +

Proceedings Volume 4104, Organic Photorefractives, Photoreceptors, and Nanocomposites; (2000) https://doi.org/10.1117/12.406477
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

We have studied the photorefractive properties of (2,4,7-trinitro-9- fluorenylidene)malononitrile (TNFM) sensitized poly(N-vinylcarbazole)/N- ethylcarbazole polymer composites doped with 2-(3,4,4-trimethylhex-2- ene-1-ylidene)-1,3-propanedinitrile and related dyes. Characterization included four-wave mixing experiments, two beam coupling and photoconductivity measurement at a wavelength of 780 nm. At an applied field of 53 V/micrometers , we have observed complete internal diffraction and at 60 V/micrometers a gain coefficient of 230 cm^-1. Small alterations in the chromophore donor group substituents were used to tune the ionization potential of the dopant dye by 0.3 eV. They affected the grating build-up time, photorefractive phase shift, and complexation with TNFM. This performance is compared to that of three newly synthesized polymethacrylates functionalized with carbazole, a dodecyl chain as an internal plasticizer and three different dyes. Here we observe net two-beam coupling gain and a diffraction efficiency of 60% at 58 V/micrometers .

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Eric Hendrickx, David Van Steenwinckel, Christiaan Engels, Elke Gubbelmans, Kurt Van Den Broeck, David Beljonne, Jean-Luc Bredas, Celest Samyn, and Andre P. Persoons "Photorefractive properties of TNFM-sensitized PVK-based polymer composites and fully functionalized polymethacrylates", Proc. SPIE 4104, Organic Photorefractives, Photoreceptors, and Nanocomposites, (13 November 2000); https://doi.org/10.1117/12.406477

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