Wide gamut, angle-insensitive structural colors based on deep-subwavelength bilayer media
Pan Hui,
Wen Zhengji,
Tang Zhihong,
Xu Gangyi,
Pan Xiaohang,
Xu Qianqian,
Lu Yue,
Xu Hao,
Sun Yan,
Dai Ning,
Hao Jiaming
Affiliations
Pan Hui
School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
Wen Zhengji
State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai, 200083, China
Tang Zhihong
School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
Xu Gangyi
Key Laboratory of Infrared Imaging Materials and Detectors, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, 200083, China
Pan Xiaohang
State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai, 200083, China
Xu Qianqian
State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai, 200083, China
Lu Yue
School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
Xu Hao
State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai, 200083, China
Sun Yan
State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai, 200083, China
Dai Ning
State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai, 200083, China
Hao Jiaming
State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai, 200083, China
Wide gamut and angle-insensitive structural colors are highly desirable for many applications. Herein, a new type of lithography-free, planar bilayer nanostructures for generating structural colors is presented, which is basically composed of a deep-subwavelength, highly absorbing dielectric layer on an opaque metallic substrate. Experimental results show that a galaxy of brilliant structural colors can be generated by our structures, and which can cover ∼50% of the standard red–green–blue color space by adjusting the nanostructure dimensions. The color appearances are robust with respect to the angle of vision. Theoretical partial reflected wave analyses reveal that the structural color effect is attributed to the strong optical asymmetric Fabry–Perot-type (F–P-type) thin-film resonance interference. The versatility of the structural color properties as well as the simplicity of their fabrication processes make this bilayer structures very promising for various applications, such as security marking, information encryption, and color display, etc.
