有机功能色素类化合物的合成与三阶非线性光学性能  

Synthesis and third-order nonlinear optical properties of organic functional chromophore compounds

作　　者：蔡志彬[1] 高建荣[1] 李小年[1] 项斌[1] 

机构地区：[1]浙江工业大学绿色化学合成技术国家重点实验室培育基地,杭州310014

出　　处：《高技术通讯》2007年第7期730-735,共6页Chinese High Technology Letters

基　　金：国家自然科学基金（20376076）资助项目.

摘　　要：设计并合成了苯并二呋喃酮、双偶氮-9,10-蒽二酮、苯并噻蒽以及偶氮-1,3,4-噻二唑4个系列的有机色素类化合物,并用UV,IR,^1H NMR和元素分析表征了结构.采用飞秒激光,运用简并四波混频法,研究了化合物的三阶非线性光学性能.它们的三阶非线性光学极化率χ^（3）为2.64～3.95×10^-13esu,非线性折射n2为4.85～7.27×10^-12esu,分子二阶超极化率γ为2.85～3.72×10^-31esu.探索了化合物的分子结构对三阶非线性光学性能的影响.长的共轭链、吸供取代基和杂环的引入、取代基强的供电子或吸电子能力等因素有利于获得较大的三阶非线性光学性能.Four types of organic functional chromophore compounds such as benzodifuranone, bisazo-9, 10-anthracenedione, benzothianthrene and azo-1,3,4-thiadiazole were designed and synthesized. Their structures were characterized by UV, IR, 1H NMR and elemental analysis. By using femtosecond laser, the third-order optical nonlinearities of the compounds were measured with degenerate four-wave mixing technique. The third-order nonlinear optical susceptibilities ^（3） of the compounds were 2.64 ~ 3.95 × 10^-13esu. The nonlinear refractive index n2 was 4.85 ~ 7.27 × 10^-12esu. The second-order hyperpolarizabilities 7 of the molecules was 2.85 ~ 3.72 × 10^-31esu. The influence of the molecular structure on the third-order optical nonlinearity was studied. The factors such as long conjugate chain, introduction of electron donors-acceptors and heterocycles, strong electron-donating and electron-withdrawing abilities lead to high third-order optical nonlinearities.

关 键 词：非线性光学 简并四波混频 有机色素 合成 

分 类 号：O472.3[理学—半导体物理]