非晶光子晶体结构色织物的制备及其数值模拟

为深入研究非晶光子晶体结构,实现对结构色的有效调控,将经快速氧化制备的壳核结构聚苯乙烯/聚多巴胺(PS/PDA)微球在棉织物上构建三维非晶光子晶体结构,采用Rsoft软件建立数值模型对其光学性质进行计算。探究晶体微球粒径、光线入射角度对光子晶体反射率的影响,并通过CIE标准色度系统得到色品坐标,在CIE色度图中直观地反映光子晶体结构色变化。研究表明:计算结果与实验测试结果较为吻合,粒径为195、222、267、287 nm的PS/PDA纳米微球构建的非晶光子晶体结构,依次对应蓝色、绿色、黄绿色和红色,且随着入射角的不同,结构色不会发生改变。通过数值模拟计算,可控制纳米微球粒径、调节非晶光子晶体的光子赝带隙,从而对产生的结构色进行有效调控。

Preparation and numerical simulation of colored fabric with amorphous photonic crystal structures

In order to study the structure of amorphous photonic crystal and achieve effective control over structural color, polystyrene/polydopamine (PS/PDA) microspheres with shell-core structure prepared by rapid oxidation were used to construct 3-D structure on cotton fabrics, and Rsoft software was used to establish a numerical model to calculate its optical properties. The influence of particle size and incident angle of crystal microsphere on the reflectivity of photonic crystal was investigated, and the chromaticity coordinate was obtained by CIE standard chromaticity system. The results show that the calculated results are in good agreement with the experimental results. The structures of PS/PDA nanospheres with particle sizes of 195, 222, 267 and 287 nm correspond to blue, green, yellow-green and red colors respectively, and the structural color will not change with the different incident angle. By numerical simulation, the size of the nanoparticles can be controlled and the photonic pseudo band gap of the amorphous photonic crystal can be adjusted effectively.