非对称共轴腔结构色产生与调控

Generation and control of structural color in asymmetric coaxial cavity

金属纳米结构应用于产生和调控结构色有巨大的潜力.本文设计了一种基于银纳米非对称共轴腔的阵列结构,研究环形腔在非对称情况下对于结构色产生和调控的影响,通过时域有限差分的方法对非对称共轴腔有序阵列进行仿真计算,得到了结构几何参数对结构色的影响.结果表明,调节共轴腔深度、开口大小和厚度都能产生丰富的结构色.实验与仿真结果基本一致.相比对称式结构的共轴腔,本文提出的非对称金属纳米结构在颜色显示方面具有更好的可调性,在彩色成像、高分辨率成像、防伪等方面有潜在应用.

Metal nanostructures have great potential for generating and regulating structural color.In this paper,an array structure based on silver nano asymmetric coaxial cavity is designed to study the influence of ring cavity on the generation and regulation of structural color.The ordered array of asymmetric coaxial cavity is simulated by the finite difference time domain method,and the influence of structural parameters on structural color is obtained.The results show that by adjusting the depth,opening size and thickness of coaxial cavity,the rich structural colors can be produced.The experimental results and the simulation results are basically consistent with each other.Compared with the coaxial cavity with symmetrical structure,the asymmetric metal nanostructure proposed in this work has good adjustability in color display,and has potential applications in color imaging,high-resolution imaging,anti-counterfeiting,and so on.