全息术
加密
频道(广播)
光学
计算机科学
计算机图形学(图像)
材料科学
光电子学
物理
计算机安全
电信
作者
Jintao Gong,Lingxing Xiong,Fei Zhang,Mingbo Pu,Minghui Hong,Xiangang Luo
标识
DOI:10.1002/lpor.202401045
摘要
Abstract Optical metasurfaces offer innovative approaches to manipulate the amplitude, phase, frequency, and polarization of light in localized regions, thus paving the way for a viable technology that can be applied in various domains, including structural coloration, multiplexed holography, and high‐resolution displays. To address the escalating need for sophisticated encryption, a novel quadruple‐security flexible plasmonic anti‐counterfeiting platform is proposed that utilizes printable centimeter‐scale (0.6 cm) metasurfaces. These metasurfaces feature four distinct signatures: They appear as color images under ambient incoherent white light, while projecting up to three different holograms under red, green, or blue circularly polarized laser illumination. Such holographic color nanoprintings are not only easily authenticated but also difficult to imitate, offering enhanced security in anti‐counterfeiting applications. The design of these multifunctional metasurfaces, which encode information solely in the surface relief of a single polymeric material with a silver coating, allows for efficient mass production through UV nanoimprinting lithography. Given the superior performance of these multifunctional plasmonic metasurfaces, this work presents tremendous potential in various fields such as multi‐level information security, cost‐effective anti‐counterfeiting, and many others.
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