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.

中文翻译：

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具有基于银纳米偏振器的超表面的双色元图像显示器

具有各向异性设计的等离子金属纳米结构具有不寻常的偏振选择特性，可用于构建纳米级的纳米偏振器。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。受马卢斯定律的支配，两种类型的银纳米块都充当具有不同取向的纳米偏振器，可以分别逐个像素地连续调制入射线偏振红光和绿光的强度。因此，可以在元设备的表面记录超紧凑、高分辨率和连续灰度的双色图像。我们通过成功地将红绿色连续灰度图像编码和解码为超表面样本来展示双色 Malus 超表面。实验捕获的具有高保真度和分辨率高达每英寸 63500 点 (dpi) 的元图像验证了我们的提议。具有连续灰度调制、超薄、高稳定性和高密度等优点，所提出的双色编码超表面可以很容易地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