一种新的芴类衍生物的三光子吸收诱导荧光和光限幅效应研究  

Three-photon-absorption induced fluorescence and optical limiting properties of a new organic compound

作　　者：刘军辉[1] 毛艳丽[1] 马文波[2] 吴谊群[2] 韩俊鹤[1] 翟凤潇[1] 

机构地区：[1]河南大学物理与信息光电子学院,开封475001 [2]中国科学院上海光学精密机械研究所,上海201800

出　　处：《物理学报》2005年第11期5173-5177,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10274019)资助的课题.~~

摘　　要：通过对新合成的芴的一种具有对称性衍生物4-2-(7-(4-氨基苯乙烯基)-9,9-二(2-乙基己基)-9H-芴-2-)乙烯基)苯胺(BASF)的DMF溶液的研究,发现其具有很强三光子吸收频率上转换荧光发射特性,实验测出上转换荧光的波长范围是456—775nm,在510nm处的荧光强度与入射光强的三次方成正比.在0.03mol/L的浓度下就有明显的三光子吸收诱导的光限幅效应.非线性吸收系数和吸收截面分别为γ=4.34×10-20cm3/W2和σ3=2.4×10-39cm6/W2.Three-photon-absorption-induced frequency up-conversion fluorescence emission has been observed in a solution of 4-2-（7- （4-amido styrene）-9,9-di （2-ethyl hexyl）-9H-fluorene-2-） ethylene） aniline （BASF） in N, N-dimethylformamide （DMF）, pumped with 38ps Q-switched 1064nm laser pulses. The spectral peak of the observed fluorescence emission is located in the 456-775nm range, and the intensity dependence of the visible emission on the IR excitation obeys the cubic law. At higher solute concentration and moderate IR excitation intensity levels, obvious optical limitation behavior has been observed due to three-photon-absorption. The measured nonlinear absorption coefficient and the molecular three-photon-absorption cross section are 4.34×10^-20 cm^3/W^2 and 2.4×10^-39 cm^6/W^2, respectively.

关 键 词：三光子吸收 光限幅 上转换荧光 吸收截面 三光子吸收 上转换荧光 光限幅效应 衍生物 效应研究 诱导 芴 苯乙烯基 非线性吸收 

分 类 号：O436.2[机械工程—光学工程]