二萘并噻吩四酮在飞秒激光下的三阶非线性光学性能  

Third-Order Optical Nonlinearity of Dinaphtho Thiophen Tetrone under Femtosecond Laser Excitation

作　　者：蔡志彬[1] 余作帅[1] 高建荣[1] 

机构地区：[1]浙江工业大学精细化工研究所,浙江杭州310014

出　　处：《激光与光电子学进展》2008年第11期53-56,共4页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(20376076)资助项目

摘　　要：合成了化合物二萘并[2,3-b:2′,3′-d]噻吩-5,7,12,13-四酮,用IR,1H NMR和元素分析表征了其结构。采用波长为800nm,脉宽为80fs的钛宝石飞秒激光,运用简并四波混频(DFWM)法,研究了化合物在非共振状态下的三阶非线性光学(NLO)性能。三阶非线性光学极化率为2.73×10-13esu,非线性折射率为5.03×10-12esu,分子二阶超极化率为2.85×10-31esu,响应时间为86fs。分析了化合物的分子结构对三阶非线性光学性能的影响。结果表明此化合物具有潜在的非线性光学应用。The compound dinaphtho [2,3-b：2＇ ,3＇-d] thiophene-5,7,12,13-tetrone was synthesized and characterized by IR, 1H NMR and elemental analysis. By using Ti ：Sapphire femtosecond laser （wavelength of 800 nm, pulse width of 80 fs）, the off-resonant third-order optical nonlinearity of the compound was measured with degenerate four-wave mixing （DFWM） technique. The third-order nonlinear optical（NLO） susceptibility was 2.73×10^-13 esu. The nonlinear refractive index was 5.03×10^-12 esu. The second-order hyperpolarizability of the molecule was 2.85×10^-31 esu. The response time was 86 fs. The influence of the molecular structure on the third-order optical nonlinearity was analyzed. These results show that this compound has potential nonlinear optical applications.

关 键 词：非线性光学 简并四波混频 二萘并噻吩四酮 三阶非线性光学性能 

分 类 号：O437[机械工程—光学工程] O626[理学—光学]