在单晶硅片上 ,以旋涂 (Spin- Coating)法制备了推 -拉型偶氮染料掺杂高分子 (PMMA)薄膜 ,其中二甲基胺基 [N(CH3 ) 2 ]作为推电子基团 ,羧基 (COOH)作为拉电子基团。利用椭圆偏振光谱和吸收光谱 ,研究了薄膜的复折射率、复介电函数和吸收系数 ,分析了影响薄膜电子光谱的因素。结果表明 ,该薄膜在 40 0～ 60 0 nm波长范围内 ,存在强而宽的吸收 ,并发现染料分子的聚集状态对其吸收光谱有较大的影响 Push-pull azo dye-doped polymer (PMMA) thin films were prepared on a monocrystalline silicon wafer by Spin-Coating method, in which dimethylamino [N (CH3) Group, a carboxyl group (COOH) as a pulling electron group. The complex refractive index, complex dielectric function and absorption coefficient of the films were investigated by ellipsometry and absorption spectroscopy. The factors affecting the electronic spectra of the films were analyzed. The results show that the film has strong and wide absorption in the wavelength range of 40 0 ​​~ 60 0 nm and found that the aggregation state of the dye molecules has a great influence on the absorption spectrum