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。 Azo dye doped polymer (PMMA) films were prepared by spin-coating on monocrystalline silicon wafers. The complex refractive index and absorption of the films were investigated by using an automatic ellipsometer with variable incidence angle and wavelength scanning. Coefficient and thickness, analyzed the factors affecting the electronic spectrum of the film. The results show that there is strong and wide absorption in the range of 400 ~ 600 nm and the aggregation state of the film has a great influence on the absorption spectrum of the dye.