用单光束方法研究C_(60)/C_(70)溶液的非线性光学性质

Study of nonlinear optical properties of C_(60)/C_(70) solution with a single light beam

本文报道了利用单光束方法研究C_(60)/C_(70)甲苯溶液的非线性光学性质,C_(60)/C_(70)的浓度为3.5×10^(-3)mol,C_(60)∶C_(70)=3∶1,实验所用的泵浦光源为被动锁模Nd∶YAG激光器,脉宽40ps,实验给出C_(60)/C_(70)溶液的非线性折射率n_2=(2.3±0.3)×10^(-11)(esu),并给出三阶超极化率r=1.1×10^(-31)(esu)。

A single light beam method for measuring the nonlinear optical index of C60/ C70 in toluence solution at picosecond range is reported. The concentration of C60/C70 is 3. 5 ×10-3mol, and the content of C60to that of C70is 3:1. The pump beam with 40ps width was generated by an passive mode-locking Nd : YAG laser. The nonlinear refractive index of C60/C70 solution is n2 = (2. 3±0. 3)×10-11(esu), the average hyper-susceptibility γ =1. 1×10-31(esu).