MC Code for CBS in anisotropic media from Coherent backscattering of light by an anisotropic biological network

The scattering strength of a random medium relies on the geometry and spatial distribution of its components as well as on their refractive index. Anisotropy can, therefore, play a major role in the optimization of the scattering efficiency both in biological and synthetic materials. In this study, we show that by exploiting the coherent backscattering phenomenon, it is possible to characterize the optical anisotropy in the <i>Cyphochilus</i> beetle scales without the need of changing their orientation or their thickness. For this reason, such a static and easily accessible experimental approach is particularly suitable for the study of biological specimens. Moreover, the estimation of the anisotropy in the <i>Cyphochilus</i> beetle scales might provide inspiration for improving the scattering strength of artificial white materials.

随机介质的散射强度取决于其组成组分的几何结构、空间分布与折射率。因此，各向异性（anisotropy）在生物材料与合成材料的散射效率优化中均可发挥关键作用。本研究表明，通过利用相干背散射（coherent backscattering）现象，无需改变Cyphochilus甲虫鳞片的取向与厚度，即可表征其光学各向异性。正因如此，这种静态且易于实施的实验方法，尤其适用于生物标本的研究。此外，对Cyphochilus甲虫鳞片各向异性的表征，可为提升人工白色材料的散射强度提供设计灵感。