Instituto de Física, Universidad Nacional Autónoma de México, Apartado Postal 20 364 01000, México City, Mexico.
Phys Rev E. 2017 Dec;96(6-1):062701. doi: 10.1103/PhysRevE.96.062701. Epub 2017 Dec 11.
We analyzed the optical band gaps for axially propagating electromagnetic waves throughout a metallic doped cholesteric elastomer. The composed medium is made of metallic nanospheres (silver) randomly dispersed in a cholesteric elastomer liquid crystal whose dielectric properties can be represented by a resonant effective uniaxial tensor. We found that the band gap properties of the periodic system greatly depend on the volume fraction of nanoparticles in the cholesteric elastomer. In particular, we observed a displacement of the reflection band for quite small fraction volumes whereas for larger values of this fraction there appears a secondary band in the higher frequency region. We also have calculated the transmittance and reflectance spectra for our system. These calculations verify the mentioned band structure and provide additional information about the polarization features of the radiation.
我们分析了轴向传播的电磁波在金属掺杂胆甾相弹性体中的光学带隙。组成的介质是由金属纳米球（银）随机分散在胆甾相液晶中制成的，其介电性质可以用共振有效单轴张量来表示。我们发现，周期性系统的带隙性质在很大程度上取决于胆甾相弹性体中纳米粒子的体积分数。特别是，我们观察到在相当小的分数体积下反射带的位移，而对于较大的分数值，在较高的频率区域出现了一个次级带。我们还计算了我们系统的透射率和反射率谱。这些计算验证了所提到的能带结构，并提供了关于辐射偏振特性的附加信息。
