金属团簇化合物MoCu_4Br_2(MePy)_6S_4和MoCu_4I_2(Py)_6S_4的超快非线性光学特性  

Ultra-fast nonlinear optical properties of two metal cluster compounds MoCu_4Br_2(MePy)_6S_4 and MoCu_4I_2(Py)_6S_4

作　　者：常存[1] 常青[1,2] 孔德贵[1,3] 

机构地区：[1]黑龙江大学电子工程学院,黑龙江哈尔滨150080 [2]复旦大学物理系,上海200433 [3]哈尔滨工业大学应用物理系,黑龙江哈尔滨150001

出　　处：《红外与激光工程》2010年第4期690-693,共4页Infrared and Laser Engineering

基　　金：黑龙江省普通高等学校青年学术骨干支持计划(1154G25);黑龙江省教育厅基金资助项目(11541265)

摘　　要：在波长为400 nm、脉冲宽度为150 fs的激光脉冲激发下,应用Z-scan技术研究了平面正方形金属团簇化合物MoCu4Br2(MePy)6S4和MoCu4I2(Py)6S4的非线性光学特性。实验结果表明:这两个金属团簇化合物非线性折射特性均表现为先谷后峰结构——自聚焦效应,而均无非线性吸收。通过理论拟合获得了这两个材料的三阶极化率,分别为1.38×10-22 m2/W和1.09×10-22 m2/W。该值与其他团簇材料在飞秒脉冲条件下的值相近,表明这两种材料在光子学器件应用方面具有很大的潜力。Nonlinear optical properties of two plan square metal cluster compounds MoCu4Br2（MePy）6S4 and MoCu4I2（Py）6S4 were investigated by using Z-scan technique under laser exciting with a pulse width of 150 fs at a wavelength of 400 nm.Experimental results show that the metal cluster compounds MoCu4Br2（MePy）6S4 and MoCu4I2（Py）6S4 exhibit valley-peak structure and optical self-focusing effect,without optical nonlinear absorption.The third-order nonlinear susceptibilities χ（3） of MoCu4Br2（MePy）6S4 and MoCu4I2（Py）6S4 were 1.38×10-22 m2/W and 1.09×10-22 m2/W,respectively.The values of the third-order nonlinear susceptibilities for the two materilals near to that of the other metal clusters under femtosecond pulse.It shows the potentiality of MoCu4Br2（MePy）6S4 and MoCu4I2（Py）6S4 on the photonics devices application.

关 键 词：平面金属团簇 光学非线性特性 Z扫描 

分 类 号：O437[机械工程—光学工程]