稠环芳烃有机物的三阶非线性光学性能研究

Study on the Third-order Nonlinear Optical Effect of Fused-Cyclic Aromatic Hydrocabon

采用Nd :YAG皮秒锁模脉冲激光λ =5 32 0nm ,运用 3D前向简并四波混频 (DFWM)的方法 ,测量了稠环芳烃中的 1 2 5 6二苯并蒽 (C2 2 H14 ) ,1 2 8 9 二苯并五苯 (C3 0 H18)的三阶非线性极化率X(3 ) ,非线性折射系数n2 以及三阶非线性的时间响应。发现该类材料具有较大的非线性效应 ,文中分析了非线性形成机制以及相关的影响因素。

The third-order nonlinear optical susceptibilit y X- (3),nonlinear refractive index n 2 and time response pro perty of 1 2 5 6 dibenzathracene (C 22H 14) and dibenzopenta cene (C 30H 18) in fused-cyclic aromatic hydrocarbon were studi ed with forward degenerate four-wave mixing (DFWM).The mechanism for their larg er nonlinear effect and faster time response was discussed.