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鉴于Morpho蝴蝶翅膀呈耀眼蓝色光泽与蝶翅表面的微纳结构有密切联系,提出了一种服务于仿生微纳制造的优化设计方法.根据生物结构的形状与尺寸,结合微纳制造中的工艺约束,建立了便于制造的仿生模型.使用严格耦合波分析对仿生模型进行光学仿真计算.在此基础上,以提高仿生结构的蓝光波段(特征波长为470nm)反射率为目标,利用遗传算法对仿生模型进行了优化设计.所得到的最优结构反射率波峰均位于470nm附近,且反射率明显高于仿生结构.为了分析最优结构的蓝光波段高反射率机理,研究了不同层数最优结构的几何特征,计算了部分结构的磁场强度分布,确定了结构中影响反射率的主要参数.
In view of Morpho butterfly wings are bright blue luster and butterfly wing surface micro-nano structure is closely related to the proposed optimization of a micro-micromanufacturing services in the design method.Based on the biological structure of the shape and size, combined with micro-nano manufacturing The bionics model is established and the bionic model is calculated by rigorous coupling wave analysis.On this basis, aiming at improving the reflectance in the blue band of the bionic structure (the characteristic wavelength is 470nm), the genetic algorithm The bionic model was optimized and the peaks of the optimal structure reflectance were all around 470nm, and the reflectance was obviously higher than that of the bionic structure.In order to analyze the mechanism of the high reflectance in the blue band of the optimal structure, The geometric characteristics of the excellent structure, the magnetic field intensity distribution of some structures was calculated, and the main parameters influencing the reflectivity in the structure were determined.