School of Physics and Electronics, State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, People's Republic of China.
Nanotechnology. 2018 Sep 28;29(39):395202. doi: 10.1088/1361-6528/aad110. Epub 2018 Jul 4.
We demonstrate a configuration to generate transmissive structural colors through triangular-lattice square nanohole arrays in aluminum (Al) film with Al nanodisks on the bottom of the nanoholes. By using a simple nanofabrication process, colors covering the entire visible light with different brightness and saturation are achieved by tuning both the period of arrays and the size of nanoholes. The optical behaviors of the structures are systematically investigated by both experimental and theoretical methods. The results indicate that the localized surface plasmon resonance of nanohole arrays plays the key role in the extraordinary transmission and meanwhile the coupling of disks and holes is also of importance for the enhanced transmission. With the wide color gamut, these kinds of vertically coupled Al nanohole/nanodisk arrays show the capabilities for high-resolution full-color printing. Compared to existing transmissive plasmonic color filters, the configuration in this work has the advantages of a simple fabrication process and using cheap aluminum materials.
我们展示了一种通过在铝（Al）薄膜中的三角晶格方纳米孔阵列中生成透射式结构颜色的配置，该阵列底部带有 Al 纳米盘。通过使用简单的纳米制造工艺，通过调整阵列的周期和纳米孔的大小，实现了涵盖整个可见光范围的不同亮度和饱和度的颜色。通过实验和理论方法系统地研究了结构的光学行为。结果表明，纳米孔阵列的局域表面等离子体共振在超透射中起着关键作用，同时盘和孔的耦合对于增强透射也很重要。这种垂直耦合的 Al 纳米孔/纳米盘阵列具有宽色域，显示出高分辨率全彩色打印的能力。与现有的透射等离子体彩色滤光片相比，本工作中的配置具有制造工艺简单和使用廉价铝材料的优点。
