Pixelated bifunctional metasurface-driven dynamic vectorial holographic color prints for photonic security platform.
Pixelated bifunctional metasurface-driven dynamic vectorial holographic color prints for photonic security platform.
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DOI：
10.1038/s41467-021-23814-5
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发表时间：
2021-06-14
影响因子：
16.6
通讯作者：
Rho J
中科院分区：
文献类型：
--
作者：
Kim I;Jang J;Kim G;Lee J;Badloe T;Mun J;Rho J
矢量全息术由于其对结构光偏振态的灵活控制，在增强光保密性和多信道光通信中的应用前景而受到广泛关注。在这里，我们提出了一个双功能元表面，它结合了结构彩色印刷和矢量全息与八个偏振通道，以先进的加密应用。在白色光下观察结构彩色印刷，而在激光照明下再现偏振编码全息图。为了对不同偏振状态的多个全息图像进行编码，采用像素化超表面。作为一个概念验证，我们设计了一个电可调光学安全平台与液晶。光学安全平台被双重加密：白色光下的图像被解密以提供第一密钥，并且相应的信息被用于经由投影的矢量全息图像完全解锁加密的信息。这种电可调光学安全平台可以实现用于安全和防伪应用的智能标签。作者提出了一种双功能超颖表面，结合结构彩色印刷观察下的白色光和偏振编码这是适当的。矢量全息术像素化设计用于编码多个全息图像，它们展示了一个电可调光学安全平台。
Vectorial holography has gained a lot of attention due to the promise of versatile polarization control of structured light for enhanced optical security and multi-channel optical communication. Here, we propose a bifunctional metasurface which combines both structural color printing and vectorial holography with eight polarization channels towards advanced encryption applications. The structural colour prints are observed under white light while the polarization encoded holograms are reconstructed under laser illumination. To encode multiple holographic images for different polarization states, a pixelated metasurface is adopted. As a proof-of-concept, we devise an electrically tunable optical security platform incorporated with liquid crystals. The optical security platform is doubly encrypted: an image under white light is decrypted to provide the first key and the corresponding information is used to fully unlock the encrypted information via projected vectorial holographic images. Such an electrically tunable optical security platform may enable smart labels for security and anticounterfeiting applications. The authors present a bi-functional metasurface, combining structural color printing observed under white light and polarization encoded It is appropriate. vectorial holography. A pixelated design is used encode multiple holographic images, and they demonstrate an electrically tunable optical security platform.
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