Wide-color-gamut, high-purity, and high-brightness thin film structural colors based on modified Fano resonant structure  

作　　者：Weijie Chen Zexiang He Zhenzhen Duan Jian Yang Ning Wang Dan Wang Zexiong Hu Nan Chen Zhengqian Luo Yikun Bu 陈炜杰;何泽湘;段珍珍;杨坚;王宁;王丹;胡泽雄;陈楠;罗正钱;卜轶坤(School of Electronic Science and Engineering,Xiamen University,Xiamen 361005,China;Fujian Key Laboratory of Ultrafast Laser Technology and Applications,Xiamen University,Xiamen 361005,China)

机构地区：[1]School of Electronic Science and Engineering,Xiamen University,Xiamen 361005,China [2]Fujian Key Laboratory of Ultrafast Laser Technology and Applications,Xiamen University,Xiamen 361005,China

出　　处：《Chinese Optics Letters》2024年第8期113-118,共6页中国光学快报（英文版）

基　　金：supported by the National Key Research and Development Program of China (No. 2020YFC2200400);the National Natural Science Foundation of China (No. 62375231);the Fujian Province Science and Technology Planning Project of China (No. 2022H6015)。

摘　　要：Recently, the Fano resonance has played an increasingly important role in improving the color performance of structural colors. In this study, we further elucidate the asymmetric spectral shape generated by Fano resonance from a phase perspective and explore four distinct continuum state structures. By integrating the proposed cavity-like structure with a metal±dielectric±metal discrete state, multilayered thin-film structural colors with minimal background reflection, as low as 8%, were successfully achieved. The reflection peak of this structure exhibits a bandwidth of approximately50 nm and reaches up to 80%, indicating heightened saturation and color brightness. Moreover, by adjusting the thickness,we effortlessly obtained a broader color gamut compared to Adobe RGB (45.2%), covering 56.7% of the CIE color space. Even adjusting a single layer can achieve a color gamut of 47.1%. In experiments, by deliberately choosing low oxygendependent materials, excellent RGB colors with high brightness and in high consistency with simulation results were successfully achieved. Therefore, the scheme's simple process for structural color creation, along with its excellent color performance and the ability to effectively replicate simulation characteristics makes it highly valuable in fields like anticounterfeiting, decoration, display devices, and solar cell panels.

关 键 词：Fano resonance structural colors full color thin films high saturation 

分 类 号：O48[理学—固体物理]