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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (21): 2433-2438. 上一篇    下一篇

研究论文

六棱柱型金属团簇化合物Mo2Ag4S8(dppy)4的合成与非线性光学性质

常青a,b   郑和根c   王燕c   赵利*,a   

  1. (a复旦大学物理系 上海 200433) (b黑龙江大学电子工程学院 哈尔滨 150080) (c南京大学配位化学国家重点实验室 南京 210093)
  • 投稿日期:2009-05-20 修回日期:2009-06-16 发布日期:2009-07-14
  • 通讯作者: 常青 E-mail:changqing@fudan.edu.cn

Synthesis and Nonlinear Optical Properties of a Hexagonal Cage Cluster Compound Mo2Ag4S8(dppy)4

Chang, Qing a,b    Zheng, Hegenc    Wang, Yanc    Zhao, Li*,a   

  1. (a Department of Physics, Fudan University, Shanghai 200433) (b College of Electronic Engineering, Heilongjiang University, Harbin 150080) (c Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093)
  • Received:2009-05-20 Revised:2009-06-16 Published:2009-07-14

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新合成了一种六棱柱型金属团簇化合物Mo2Ag4S8(dppy)4, 并用X射线单晶衍射结构分析方法测定了其晶体结构. 应用Z-scan技术研究了该金属团簇化合物在波长为532 nm的纳秒激光脉冲作用下的三阶非线性光学特性. 为了研究Mo2Ag4S8(dppy)4的非线性起源, 应用泵浦探测技术研究了该金属团簇化合物在波长为532 nm的皮秒激光脉冲作用下的光学非线性响应. 实验结果表明金属团簇化合物Mo2Ag4S8(dppy)4具有自聚焦特性和非线性吸收特性; 非线性折射率n2, 非线性吸收系数β和非线性极化率χ(3)分别为1.45×10－10 esu, 6.2×10－10 m/W及2.1×10－11 esu. 实验结果表明金属团簇化合物Mo2Ag4S8(dppy)4的光学非线性响应是非线性吸收和非线性散射共同作用的结果.

关键词: 金属团簇, 光学非线性特性, Z扫描, 泵浦-探测

A new hexagonal prism shaped metal cluster compound Mo2Ag4S8(dppy)4 was synthesized and structurally characterized by single crystal X-ray diffraction measurement. Its third-order nonlinear optical (NLO) properties were investigated by using a Z-scan technique under nanosecond laser pulses at 532 nm. Optical nonlinear response of the metal cluster was researched by using a time-resolved pump-probe experiment under picosecond laser pulses at 532 nm. The experimental results show that the metal cluster exhibits both optical self-focusing effect and optical nonlinear absorption. The nonlinear refractive index n2, the nonlinear absorption coefficient β, and the third-order nonlinear susceptibility χ(3) of Mo2Ag4S8(dppy)4 are 1.45×10－10 esu, 6.2×10－10 m/W, and 2.1×10－11 esu, respectively. The experimental results indicate that the optical nonlinear response for Mo2Ag4S8(dppy)4 originates from the combination of nonlinear absorption and nonlinear scattering.

Key words: metal cluster, optical nonlinearity, Z-scan, pump-probe

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