Zhang Yilun, Chen Ming, Qin Zujun, Teng Chuanxin, Cheng Yu, Xu Ronghui, Liu Houquan, Deng Shijie, Deng Hongchang, Yang Hongyan, Qu Shiliang, Yuan Libo
Opt Express. 2021 Aug 2;29(16):25894-25902. doi: 10.1364/OE.433664.
Plasmonic metallic nanostructures with anisotropic design have unusual polarization-selective characteristic which can be utilized to build nanopolarizers at the nanoscale. Herein, we propose a dual-color image display platform by reconfiguring two types of silver nanoblocks in a single-celled metasurface. Governed by Malus's law, the two types of silver nanoblocks both acting as nanopolarizers with different orientations can continuously modulate the intensity of incident linearly polarized red and green light pixel-by-pixel, respectively. As a result, an ultra-compact, high-resolution, and continuous-greyscale dual-color image can be recorded right at the surface of the meta-device. We demonstrate the dual-color Malus metasurface by successfully encoding and decoding a red-green continuously-grayscale image into a metasurface sample. The experimentally captured meta-image with high-fidelity and resolution as high as 63500 dots per inch (dpi) has verified our proposal. With the advantages such as continuous grayscale modulation, ultrathin, high stability and high density, the proposed dual-color encoded metasurfaces can be readily used in ultra-compact image displays, high-end anti-counterfeiting, high-density optical information storage and information encryption, etc.
具有各向异性设计的等离子体金属纳米结构具有不同寻常的偏振选择性特性，可用于在纳米尺度上构建纳米偏振器。在此，我们通过在单细胞超表面中重新配置两种类型的银纳米块，提出了一种双色图像显示平台。根据马吕斯定律，这两种类型的银纳米块均作为具有不同取向的纳米偏振器，可分别逐像素地连续调制入射线性偏振红光和绿光的强度。因此，超紧凑、高分辨率和连续灰度的双色图像可以直接记录在超表面器件的表面。我们通过成功地将红绿连续灰度图像编码和解码到超表面样品中，展示了双色马吕斯超表面。实验捕获的具有高达每英寸63500点（dpi）的高保真度和分辨率的超表面图像验证了我们的方案。所提出的双色编码超表面具有连续灰度调制、超薄、高稳定性和高密度等优点，可轻松用于超紧凑图像显示、高端防伪、高密度光学信息存储和信息加密等领域。
