偶氮染料掺杂高分子PM MA薄膜的光学参数

Determination of Optical Parameters of a Azo Dye-Doped PMMA Thin Film

在单晶硅片上 ,利用旋涂法 ,制备了偶氮染料掺杂高分子 (PMMA)薄膜 ,利用可变入射角、波长扫描的全自动椭圆偏振光谱仪 ,研究了薄膜的复折射率、吸收系数和厚度 ,分析了影响薄膜电子光谱的因素。研究结果表明 ,该薄膜在 4 0 0～ 6 0 0 nm波长范围内 ,存在强而宽的吸收 ,并且发现分子的聚集状态对该染料的吸收光谱有较大的影响。

A azo dye doped polymer thin film has been made by spin casting method on single crystal silicon. The optical parameters of the film have been measured at a scanning ellipsometer with the analyser and polarizer rotating synchronously in the wavelength region of 350~800 nm. The results show that the film has a strong and broad absorption in the region, and the aggregation state of the dye molecules greatly influences its absorption spectrum.