Three-dimensional cavity nanoantennas with resonant-enhanced surface plasmons as dynamic color-tuning reflectors
Three-dimensional cavity nanoantennas with resonant-enhanced surface plasmons as dynamic color-tuning reflectors
复制标题
具有共振增强表面等离子体作为动态调色反射器的三维腔纳米天线
DOI：
10.1039/c6nr06934g
复制
发表时间：
2017-03-14
期刊：
影响因子：
6.7
通讯作者：
Li, J.
中科院分区：
文献类型：
--
作者：
Fan, J. R.;Wu, W. G.;Li, J.
作为表面等离子体辅助控制特定频率光场的等离子体天线，金属纳米结构最近已经成为吸引人的等离子体色彩工程的关键光学元件。特别是，等离子体共振纳米腔可以集中光波能量来强烈增强光与物质的相互作用，使它们成为微调彩色显示器的理想候选光学元件。受蝴蝶翅膀混色效应的启发，研制了一种新型等离子体激元、多共振、窄带(最小值约为45 nm)、高反射率(最大值约为95%)和动态调色反射器。这是通过在独立的顶柱纳米结构阵列中的等离子体共振纳米腔的周期性图案来实现的。这种腔耦合结构通过等离子体驻波共振表现出多次窄带选择性和连续可调的反射。因此，它们可以产生各种暗场鲜艳的反射颜色，质量好，颜色信号强，在光学衍射极限下色调变化良好。该方案为实现超紧凑型光子数据存储和隐写、比色传感、3D全息图和其他等离子体辅助光子器件的个性化和定制化应用提供了一种巧妙的策略。
As plasmonic antennas for surface-plasmon-assisted control of optical fields at specific frequencies, metallic nanostructures have recently emerged as crucial optical components for fascinating plasmonic color engineering. Particularly, plasmonic resonant nanocavities can concentrate lightwave energy to strongly enhance light-matter interactions, making them ideal candidates as optical elements for fine-tuning color displays. Inspired by the color mixing effect found on butterfly wings, a new type of plasmonic, multiresonant, narrow-band (the minimum is about 45 nm), high-reflectance (the maximum is about 95%), and dynamic color-tuning reflector is developed. This is achieved from periodic patterns of plasmonic resonant nanocavities in free-standing capped-pillar nanostructure arrays. Such cavity-coupling structures exhibit multiple narrow-band selective and continuously tunable reflections via plasmon standing-wave resonances. Consequently, they can produce a variety of dark-field vibrant reflective colors with good quality, strong color signal and fine tonal variation at the optical diffraction limit. This proposed multicolor scheme provides an elegant strategy for realizing personalized and customized applications in ultracompact photonic data storage and steganography, colorimetric sensing, 3D holograms and other plasmon-assisted photonic devices.