一种新型有机金属化合物纳秒时域饱和吸收特性研究  

Research on Saturable Absorption of a New Organometallic Complex with Nanosecond Lasers

作　　者：张福军[1] 孙香冰[1] 任诠[1] 王彦玲[2] 杨旭东[1] 高怡[1] 杨洪亮[1] 张光辉[2] CHOW Y T 许东[2] 

机构地区：[1]山东大学信息科学与工程学院,济南250100 [2]山东大学晶体材料研究所国家重点实验室,济南250100 [3]香港城市大学光电研究中心,中国香港

出　　处：《光子学报》2008年第2期247-251,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(60377016,60476020);国家863高技术研究发展计划(2002AA313070)资助

摘　　要：合成了一种新型有机金属配合物Cetyltri methylammonium-bis(2-thioxo-1,3-dithiole-4,5-dithiolato)-copper(简称CtCu)材料.采用单光束Z扫描测试技术,在波长为1053nm,脉宽为1ns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,激发态的有效吸收截面为σeff=1.10×10-19cm2,与基态吸收截面的比值为1∶484.利用非线性透过率实验验证了材料的饱和吸收特性,并对其产生机理进行了分析.实验结果表明,该材料在近红外波段的激光脉冲压缩方面有潜在的应用前景.A new type of organicometallic complex, Cetyltrimethylammonium- bis （2-thioxo-1,3- dithiole-4, 5-dithiolato）-copper, abbreviated as CtCu, is synthesized and its third-order optical nonlinearity is investigated using single beam Z-scan technique at 1053 nm with 1 ns laser duration. Strong saturable absorption is observed and the excited state effective absorption cross section is atate= 1.10× 10^-19 cm^2. The absorption cross section ratio between the excited state and the ground state is 1 ： 484. Nonlinear transmission measurement has proved the saturable absorption property further and the mechanism of the nonlinearity was discussed. All the results show that CtCu is a potential material in the application to laser pulse compression in the near-infrared region.

关 键 词：非线性光学 三阶非线性 饱和吸收 Z扫描 有机金属配合物 

分 类 号：O437[机械工程—光学工程]