短程有序及近场效应之于光散射与结构色

Short-range order and near-field effects on optical scattering and structural coloration.

作者信息

Liew S F, Forster J, Noh H, Schreck C F, Saranathan V, Lu X, Yang L, Prum Richard O, O'Hern C S, Dufresne E R, Cao H

机构信息

Department of Applied Physics, Yale University, New Haven, Connecticut 06511, USA.

出版信息

Opt Express. 2011 Apr 25;19(9):8208-17. doi: 10.1364/OE.19.008208.

DOI:10.1364/OE.19.008208

PMID:21643071

Abstract

We have investigated wavelength-dependent light scattering in biomimetic structures with short-range order. Coherent backscattering experiments are performed to measure the transport mean free path over a wide wavelength range. Overall scattering strength is reduced significantly due to short-range order and near-field effects. Our analysis explains why single scattering of light is dominant over multiple scattering in similar biological structures and is responsible for color generation.

摘要

我们研究了具有短程有序的仿生结构中波长依赖的光散射。进行了相干背散射实验，以测量宽波长范围内的输运平均自由程。由于短程有序和近场效应，整体散射强度显著降低。我们的分析解释了为什么在类似的生物结构中，光的单次散射比多次散射占主导地位，并且是颜色产生的原因。