一种新型芴类衍生物的光谱及光限幅性能分析  

Study on the Spectral Properties and Optical Limiting Performance of a New Fluorene Derivative

作　　者：陈玉霞[1,2] 刘军辉[1] 黄明举[1] 

机构地区：[1]河南大学物理与电子工程学院河南省光电信息材料与器件重点学科开放实验室,河南开封475001 [2]商水县第一高级中学,河南周口466000

出　　处：《光学学报》2012年第2期189-194,共6页Acta Optica Sinica

基　　金：国家青年科学基金项目(11004048)资助课题

摘　　要：利用Heck反应合成了一种新型的共轭长链的芴类衍生物,研究了它的线性和非线性光学特性。测试了它在石油醚、二氯甲烷、乙酸乙酯和二甲基甲酰胺(DMF)四种不同极性溶剂中的紫外吸收和荧光光谱特性,结果表明溶剂极性对新物质紫外吸收光谱和荧光光谱有一定程度的影响,随着溶剂极性的增加,吸收光谱和荧光光谱均红移。在激发波长为1064nm皮秒激光器作用下,测试了新物质的光学非线性——光限幅效应,结果显示其透射率随入射光强的变化呈现非线性降低,限幅效应明显。根据分析得出,此光限幅效应是由三光子吸收引起。通过数据拟合,得出了新物质的三光子吸收系数γ为5.4×10-21 cm3/W2及相应的三光子吸收截面σ′3为7.3×10-77 cm6.s2。A new fluorene-based derivative with long conjugated structure is synthesized by the Heck reaction.The ultraviolet absorption and fluorescence spectrum are measured in four different polar solvents（petroleum ether,methylen echloride,ethyl acetate,DMF）.The results show that the solvent polarity has certain effect on the UV absorption and fluorescence spectrum of the new compound,in certain details,the UV absorption and fluorescence spectrum red shift occurs with the increase of solvent polarity.Picosecond pulse laser whose excitation wavelength is 1064 nm is used to investigate the optical limiting of the new material.The experimental results show that the new material has a large three-photon absorption coefficient（γ=5.4×10-21 cm3/W2） and the three-photon absorption cross section σ3=7.3×10-77 cm6·s2.

关 键 词：非线性光学 三光子吸收 光限幅 芴衍生物 

分 类 号：O482.31[理学—固体物理]