Photoassisted poling and orientational relaxation of dye molecules in polymers: the case of spiropyran

Sophie Hosotte; Michel L. Dumont

doi:10.1117/12.256189

1 November 1996 Photoassisted poling and orientational relaxation of dye molecules in polymers: the case of spiropyran

Sophie Hosotte, Michel L. Dumont

Proceedings Volume 2852, Nonlinear Optical Properties of Organic Materials IX; (1996) https://doi.org/10.1117/12.256189
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

Photoassisted poling of azo-dyes in polymer films is now well-known: it is a consequence of trans-cis photoisomerization. We report new experiments involving the photoisomerization of spiropyrans into merocyanines. With the help of a theoretical model, we discuss poling mechanisms. The study of the relaxation of electro-optical properties of photomerocyanine gives new results on the rotational mobility of dye molecules in polymers: in addition to the site-to-site variation, it is necessary to introduce a time variation of the mobility, after the end of the poling process.

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Sophie Hosotte and Michel L. Dumont "Photoassisted poling and orientational relaxation of dye molecules in polymers: the case of spiropyran", Proc. SPIE 2852, Nonlinear Optical Properties of Organic Materials IX, (1 November 1996); https://doi.org/10.1117/12.256189

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