Studies on photoresponsive 1D-photonic crystals

我们研究了具有精确控制层厚的多层膜的光响应行为，该多层膜是通过叠置偶氮官能化聚合物液晶和聚乙烯醇（PVA）而制备的。多层薄膜反射特定波长的光，这取决于层厚度和折射率，并且通过用可见光和UV光照射显示出反射强度的可逆变化。通过具有联苯侧链的单体的共聚，增加了反射强度的变化率。此外，通过向多层膜提供微褶皱结构，改善了反射强度的角度依赖性。

We have investigated photo-response behavior of multi-bilayred films having precisely controlled layer thickness prepared by stacking an azo-functionalized polymer liquid crystal and polyvinylalcohol alternatively, PVA. The multi-bilayered fims reflected a light of specific wavelength depending on the layer thickness and refractive index, and showed the reversible change in the reflection intensity by irradiation with visible and UV lights. The rate of the change in the reflection intensity was increased by copolymerization of monomers having biphenyl side chain. In addition, the angle dependence of the reflection intensity was improved by providing the micro-wrinkle structure to the multi-bilayred films.