Wang Hao, Zhang Baifu, Han Cheng, Ding Jianping
Opt Express. 2021 Sep 27;29(20):32377-32387. doi: 10.1364/OE.440221.
Polarization multiplexing of metasurfaces conventionally requires the synthesis of both geometric and dynamic phases of meta-atoms. We propose a dynamic-phase-only polarization-multiplexing metasurface that consists of three types of polarization-decoupled meta-atoms and covers the 0-2π phase range. As illustrative examples, we designed and investigated a polarized beam splitter that can independently deflect x- and y-polarized incident lights at arbitrary angles. Furthermore, we designed and studied polarization-multiplexing metasurface-holography embracing double channels of orthogonal polarizations. Both metadevices demonstrate the effectiveness of our approach. This study paves the way for the design of polarization-multiplexing electromagnetic structures for application in metamaterials and metasurfaces.
传统上，超表面的偏振复用需要合成超原子的几何相位和动态相位。我们提出了一种仅具有动态相位的偏振复用超表面，它由三种类型的偏振解耦超原子组成，覆盖0-2π相位范围。作为示例，我们设计并研究了一种偏振分束器，它可以以任意角度独立地偏转x偏振和y偏振的入射光。此外，我们设计并研究了包含正交偏振双通道的偏振复用超表面全息术。这两种超表面器件都证明了我们方法的有效性。这项研究为设计用于超材料和超表面应用的偏振复用电磁结构铺平了道路。
