一种新型有机金属化合物的三阶光学非线性研究  

Study on Third-Order Optical Nonlinearities of a Novel Organo-Metallic Compound

作　　者：孙香冰[1] 任诠[1] 张福军[1] 高怡[1] 杨洪亮[1] 冯林[1] 

机构地区：[1]山东大学光学系,山东济南250100

出　　处：《中国激光》2006年第11期1501-1505,共5页Chinese Journal of Lasers

基　　金：国家863计划(2002AA313070);国家自然科学基金(60377016;60476020)资助项目

摘　　要：为了研究一种新型有机金属化合物(十六烷基三甲基铵)双(1,3-二硫杂环戊烯-2-硫酮-4,5-二硫基)-镍(简称CTNi)的三阶非线性光学性质,配制了浓度为1.0×10-4mol/L的丙酮溶液作为待测样品,采用Z扫描测试技术,在波长为1064 nm,脉宽为40 ps的条件下研究了该样品的三阶非线性光学性质.研究发现,该材料具有很强的饱和吸收特性,其激发态有效吸收截面为eσff=1.47×10-18cm2,相应的非线性吸收系数β=-4.36×10-12m/W.另外,Z扫描曲线显示该材料还具有较强的自散焦效应,其三阶非线性折射系数n2=-1.55×10-18m2/W.In order to investigate the third-order optical nonlinearities of a novel type ot organo-metalliC compound, [C16 H33 （CH3）3N] Ni （dmit）2 （dmit2- = 4, 5-dithiolate-1, 3-dithiole-2-thione）, abbreviated as CTNi, a sample solution with concentration 1.0 × 10^-4 mol/L in acetone was prepared and its third-order optical nonlinearity was investigated using Z-scan technique at 1064 nm with 40 ps laser duration. Strong saturable absorption was found, the excited states effective absorption cross section was σeff= 1.47×10^-18 cm^2, and the corresponding nonlinear absorption coefficient was β= -4.36 × 10^-12 m/W. In addition, Z-scan curves revealed a self-defocusing effect with a large negative nonlinear refraction coefficient n2 =- 1.55× 10^-18 m^2/W.

关 键 词：非线性光学 三阶光学非线性 有机金属化合物 Z扫描技术 

分 类 号：O437[机械工程—光学工程]