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分别用主客掺杂法和种子乳液聚合法制备了含相同浓度偶氮染料分散红4-(2-hydroxyethyl)ethylamino-2-chloro-4-nitroazobenzene(Disperse Red 13,DR13)的聚甲基丙烯酸甲酯poly(methyl methacrylate)(PMMA)均匀薄膜样品。用经斩波器调制的线偏振氩离子激光(514 nm,CW)作用于样品产生光致双折射。作为探测光的线偏振氦氖激光(633 nm,CW)经过样品,通过与原来偏振方向垂直的检偏器的透射光强强度的调制,实现了光控光的全光开关效应。研究比较了两种样品在控制不同光功率下的光致双折射效应和全光开关效应,比较发现用种子乳液聚合法制备的具有核壳结构的样品在控制光功率、开关时间及开关调制深度等方面均优于主客掺杂样品。
Polymethylmethacrylate (PMMA) with the same concentration of azo dye-dispersed red 4- (2-hydroxyethyl) ethylamino-2-chloro-4-nitroazobenzene (Disperse Red 13, DR13) was prepared by the host-guest doping method and seed emulsion polymerization Poly (methyl methacrylate) (PMMA) Uniform film samples. Photo-induced birefringence was induced on a sample by a chopper-modulated linearly polarized argon-ion laser (514 nm, CW). The linearly polarized He-Ne laser (633 nm, CW) as the probe light passes through the sample, and the all-optical switching effect of the light-controlled light is achieved through the modulation of the transmitted light intensity of the analyzer perpendicular to the original polarization direction. The comparison of the photorefractive birefringence effect and the all-optical switching effect of the two samples under different optical powers was carried out. The results showed that when the samples with core-shell structure prepared by seed emulsion polymerization were used to control the optical power, the switching time and the depth of modulation Etc. are better than the host guest doped samples.