Vectorial Holograms with a Dielectric Metasurface: Ultimate Polarization Pattern Generation
Vectorial Holograms with a Dielectric Metasurface: Ultimate Polarization Pattern Generation
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DOI：
10.1021/acsphotonics.9b00678
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发表时间：
2019-11-01
期刊：
影响因子：
7
通讯作者：
Faraon, Andrei
中科院分区：
文献类型：
--
作者：
Arbabi, Ehsan;Kamali, Seyedeh Mahsa;Faraon, Andrei
控制光的偏振对于激光材料处理、显示系统和光谱学等中的各种应用一直是令人感兴趣的。尽管有很大的进步，但使用天然双折射材料和液晶对光的偏振的控制水平仍然有限。近年来，电介质超颖表面实现了对光的偏振和相位的前所未有的控制。在这里，我们展示了矢量全息图几乎任意偏振模式，使用结构双折射介质超颖表面。使用修改的Gerchberg-Saxton算法和转换的红，绿，蓝数据在任意彩色图像的斯托克斯参数，我们表明，演示的超表面可以存储和投影彩色图像数据的偏振态的单色全息图。除了具有增强的安全性和数据存储能力的全息图之外，我们相信，所开发的概念和方法将刺激先进结构照明技术的新应用，并且更普遍地，无论何时需要复杂的偏振模式。
Controlling the polarization of light has' been of interest for various applications in laser materials processing, display systems, and spectroscopy among others. Despite great advancements, the level of control over the polarization of light using naturally birefringent materials and liquid crystals is still limited. In recent years, dielectric metasurfaces have enabled an unprecedented control over the polarization and phase of light. Here, we demonstrate vectorial holograms with almost arbitrary polarization patterns using structurally birefringent dielectric metasurfaces. Using a modified Gerchberg-Saxton algorithm and converting the red-green-blue data in arbitrary color images to Stokes parameters, we show that the demonstrated metasurfaces can store and project color image data in the polarization state of a monochromatic hologram. In addition to holograms with enhanced security and data storage capacity, we believe that the developed concepts and methods will spur new applications in advanced structured illumination techniques, and more generally, whenever a complex polarization pattern is required.