Abstract Tuning the refractive index of the transparent materials is essential for optical applications. Herein, we report novel materials with a tunable refractive index that are prepared by blending poly(methyl methacrylate) (PMMA) with different concentrations of two polyphosphate hybrid polymers (P1 and P2), having phosphorus in the main chain. The refractive indices and associated optical parameters of these polymers and hybrid materials (PB1 and PB2 series) are investigated using ellipsometry and optical modelling method to find their applicability in optics. Refractive indices of these materials are fine-tuned by altering the ratio of PMMA to P1 or P2. This approach is simple and ideal for obtaining homogeneous blends. Refractive index tunability of 0.05 and 0.1 are achieved for PB1 and PB2 series, respectively, by this approach. Abbe numbers of these blends are reasonable for PB1 series compared to the conventional lens materials, with a maximum value of 56 achieved in the case of PB120 blend. In addition, the trend in variation of extinction coefficient with wavelength for blends PB250, PB260 and PB280 seem promising for optical filter kind of applications. These results show that the synthesized polymer blends are promising as optical materials with refractive index tunability.

中文翻译：

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用于光学应用的具有可调折射率的聚（甲基丙烯酸甲酯）/聚磷酸盐混合物

摘要 调整透明材料的折射率对于光学应用至关重要。在此，我们报告了通过将聚甲基丙烯酸甲酯 (PMMA) 与不同浓度的两种多磷酸盐杂化聚合物（P1 和 P2）共混而制备的具有可调折射率的新型材料，在主链中具有磷。使用椭偏仪和光学建模方法研究了这些聚合物和混合材料（PB1 和 PB2 系列）的折射率和相关光学参数，以发现它们在光学中的适用性。这些材料的折射率通过改变 PMMA 与 P1 或 P2 的比率进行微调。这种方法简单且适用于获得均匀的混合物。通过这种方法，PB1 和 PB2 系列的折射率可调性分别为 0.05 和 0.1。与传统镜片材料相比，这些混合物的阿贝数对于 PB1 系列来说是合理的，PB120 混合物的阿贝数达到最大值 56。此外，混合 PB250、PB260 和 PB280 的消光系数随波长变化的趋势似乎对光学滤波器类应用很有希望。这些结果表明合成的聚合物共混物作为具有折射率可调性的光学材料是有前途的。