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中文摘要：
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1064nm，脉宽为40ps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σeff=1．47×10^-18cm^2，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^-18m^2／w。
英文摘要：
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.
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