噁英鎓类高聚物薄膜非线性折射率的测量及其时间分辨研究  

A study of measurement of nonlinear refractive index and time resolution for pyrylium-doped polymer films

作　　者：庄大奎[1] 王文耀[1] 邱佩华[1] 刘华[1] 舒菊坪 

机构地区：[1]中国科学院上海光学精密机械研究所激光物理室,上海201800 [2]中国科学院上海光学精密机械研究所激光材料室,上海201800

出　　处：《光学学报》1992年第6期572-574,共3页Acta Optica Sinica

摘　　要：本文报道有机杂环化合物(口恶)英(钅翁)掺杂高聚物PMMA薄膜的光学特征,在600～1000nm波长范围内,透射率为80～90%,材料折射率n=1.554,利用反向传播简并四波混频法测得该薄膜的非线性光学系数x^(3)为10^(-10)e.s.u.,并观测到后向泵浦束被延迟情况下,前向泵浦光束与探测光束形成光栅瞬态弛豫时间分辨曲线,它的弛豫时间为30ps.In this letter we report the nonlinear property of pyrylium-doped superpolymer studied by degenerate four-wave mixing (DFWM). The nonlinear susceptibility x(3) of pyrylium-doped polymer is 3×10-10 e.s.u.. The time resolution curve formed by the decay of phase conjugate reflection as a function of the delay of the backward pump pulse in the counterpropagating DFWM scheme was observed, and the relaxation time is 30 ps. The electronic and brientational mechanisms are discussed.

关 键 词：非线性折射率 高聚物薄膜 

分 类 号：O484.41[理学—固体物理]