16 December 1993 Photorefractive effect in an aminonitrostilbene side-chain copolymer
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The photorefractive effect has been observed in a 1/1 side chain copolymer of N- methacryloxyethyl-N-methylaminonitrostilbene and methylmethacrylate. Holographic gratings were written in this polymer at 633 nm in 4 - 8 micrometers thick films at low laser powers and detected using four wave mixing and two beam coupling. The polymer which has a high linear electro-optic coefficient was intrinsically photorefractive and did not require the addition of photoconducting or charge generative components. Diffraction efficiencies on the order of 10-5 - 10-4 were measured by four wave mixing. Two beam coupling provided conclusive evidence that the observed effect was photorefractive in nature.
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Michael J. Sansone, Michael J. Sansone, Chia-Chi Teng, Chia-Chi Teng, Anthony J. East, Anthony J. East, Mark S. Kwiatek, Mark S. Kwiatek, } "Photorefractive effect in an aminonitrostilbene side-chain copolymer", Proc. SPIE 2025, Nonlinear Optical Properties of Organic Materials VI, (16 December 1993); doi: 10.1117/12.165265; https://doi.org/10.1117/12.165265

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