摘要
We conducted structural characterizations, reflection measurements, and theoretical simulations on the iridescent green of the wings of Papilio bianor ganesa. We found that the green iridescence origi- nated from a stack of about 9 periodic structure composed of chitin layers and air-spacer layers. This periodic structure gave rise to a high-reflection band in yellowish-green part of the visible spectrum under normal incidence. With increasing incident angle, all reflection peaks showed a blue shift in wavelength. Based on the structural characterizations, the theoretical simulations accurately predicted the shifts in spectral reflectivity which might be observed experimentally.
We conducted structural characterizations, reflection measurements, and theoretical simulations on the iridescent green of the wings of Papilio bianor ganesa. We found that the green iridescence originated from a stack of about 9 periodic structure composed of chitin layers and air-spacer layers. This periodic structure gave rise to a high-reflection band in yellowish-green pert of the visible spectrum under normal incidence. With increasing incident angle, all reflection peaks showed a blue shift in wavelength. Based on the structural characterizations, the theoretical simulations accurately predicted the shifts in spectral reflectivity which might be observed experimentally.
基金
Supported by the Shanghai Natural Science Foundation (Grant No. 04JC14018)
the National Key Basic Research Special Foundation of China and the Program for Changjiang Scholars and Innovative Research Team in University
关键词
结构颜色
蝴蝶
刻度
干涉波
structural color, papilio butterfly, multilayer, interference, scale
