31 October 2016 A printable color filter based on the micro-cavity incorporating a nano-grating
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A printable color filter based on the photonic micro-cavity incorporating a nanostructure is proposed, which consists of a nano-metallic grating, a dielectric layer and aluminum (Al) film. According to the resonance induced by different dielectric depths of the micro-cavity, two dielectric heights for the same resonant wavelength are chosen to form the grating heights relative to the Al film. With the contribution of the cavity resonance and the surface plasmon resonance, the proposed structure performs enhanced broadband filtering characteristics with good angular tolerance up to 48° compared to the one of the micro-cavity as well as the one of the metallic grating. Therefore, reflective filters for RGB colors are designed incorporating the proposed structure. Furthermore, for the proposed structure shows great polarization dependence even at normal incidence, it can also be utilized as an anticounterfeiting certificate.
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Yan Ye, Fengchuan Xu, Shangliang Wu, Wenqiang Wan, Wenbin Huang, Yanhua Liu, Donglin Pu, Guojun Wei, Yun Zhou, Yanyan Wang, Wen Qiao, Yishen Xu, Linsen Chen, "A printable color filter based on the micro-cavity incorporating a nano-grating", Proc. SPIE 10022, Holography, Diffractive Optics, and Applications VII, 100220Q (31 October 2016); doi: 10.1117/12.2245673; https://doi.org/10.1117/12.2245673

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