Luna Ana, Macías Demetrio, Skigin Diana, Inchaussandague Marina, Schinca Daniel, Gigli Miriam, Vial Alexandre
Grupo de Electromagnetismo Aplicado, Departamento de Física, FCEN, Universidad de Buenos Aires, and IFIBA, CONICET Ciudad Universitaria, Pabellón I, C1428EHA Buenos Aires, Argentina.
Opt Express. 2013 Aug 12;21(16):19189-201. doi: 10.1364/OE.21.019189.
We investigate the iridescence exhibited by Ceroglossus suturalis beetles, which mostly live endemically in the southern end of South America. Two differently colored specimens have been studied. We observed and characterized the samples by different microscopy techniques, which revealed a multilayer structure within their cuticle. Using measured reflectance spectra as input data, we applied heuristic optimization techniques to estimate the refractive index values of the constituent materials, to be introduced within the theoretical model. The color of the samples was calculated for different incidence angles, showing that multilayer interference is the mechanism responsible for the observed iridescence.
我们研究了主要分布于南美洲南端的特有物种——缝合线锯锹甲所呈现的虹彩现象。我们研究了两个颜色不同的标本。通过不同的显微镜技术对样本进行了观察和表征，结果显示其角质层内存在多层结构。我们将测量得到的反射光谱作为输入数据，应用启发式优化技术来估计构成材料的折射率值，并将这些值引入理论模型中。我们计算了不同入射角下样本的颜色，结果表明多层干涉是导致观察到的虹彩现象的原因。
