Abstract In this paper, a novel method is proposed to achieve two distinct information channels by simultaneously manipulating both the transmitted cross- and co-polarized components of a 1-bit coding metasurface under linearly polarized incidence. Compared to previously demonstrated incidence-switchable or position multiplexed holograms, our proposed coding meta-hologram can simultaneously project two independent holographic images without inevitable change of the incidence state and can at the same time also avoid crosstalk between different channels. Moreover, the orientation of the double-layered split ring (SR) apertures is specially designed to be 45° or 135° to achieve identical multiplexed functionality for both x-polarized and y-polarized incidences. The proof-of-concept experimental demonstrations present total transmittance efficiency above 30% for the dual linearly polarized incidences at 15 GHz, and good imaging performances with 53.98%/48.18% imaging efficiency, 1.55%/1.46% RMSE, and 29.9/28.72 peak signal-to-noise ratio for the cross-/co-polarized channels under y-polarized incidence, and 47.27%/45.75% imaging efficiency, 1.55%/1.43% RMSE, and 18.74/25.93 peak signal-to-noise ratio under x-polarized incidence, demonstrating great potential of the proposed multiplexed coding meta-hologram in practical applications such as data storage and information processing.

中文翻译：

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利用编码超表面的双偏振复用超全息图

摘要 在本文中，提出了一种新方法，通过在线性偏振入射下同时操纵 1 位编码超表面的传输交叉和共极化分量来实现两个不同的信息通道。与之前展示的入射可切换或位置复用全息图相比，我们提出的编码元全息图可以同时投影两个独立的全息图像，而不会不可避免地改变入射状态，同时还可以避免不同通道之间的串扰。此外，双层裂环 (SR) 孔径的方向专门设计为 45° 或 135°，以实现 x 偏振和 y 偏振入射的相同复用功能。