文献类型：期刊文献

英文题名：Dielectric characteristic of photoinduced isomerization in azo-dye doped polymeric matrices

作者：Luo, Duanbin[1]; Deng, Li[2]

机构：[1]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[2]E China Normal Univ, Key Lab Opt & Magnet Resonance Spect, Shanghai 200062, Peoples R China

年份：2006

卷号：88

期号：18

外文期刊名：APPLIED PHYSICS LETTERS

收录：;EI(收录号：2006209884956);WOS:【SCI-EXPANDED(收录号:WOS:000237321600004)】；

语种：英文

外文关键词：Azo dyes - Chromophores - Dielectric relaxation - Isomerization - Permittivity - Polymethyl methacrylates

摘要：The dielectric permittivities and losses of poly(methyl methacrylate) doped with different concentrations of azo dye are investigated under the irradiation of 532 nm light for the first time. The dielectric permittivities increase with the concentration of chromophores increasing, and the dielectric relaxation is mainly influenced by the doped azo-dye chromophores. Given the dye concentration, the dielectric permittivities depend on the pump power of 532 nm light. With the increase of pumping light power, the low frequency dielectric losses increase while the high frequency dielectric losses decrease. The results are explained based on the photoinduced isomerization of chromophores and the interaction between the chromophores and polymer matrices. (c) 2006 American Institute of Physics.