Polarization Encoded Color Image Embedded in a Dielectric Metasurface
Polarization Encoded Color Image Embedded in a Dielectric Metasurface
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DOI：
10.1002/adma.201707499
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发表时间：
2018-05-24
影响因子：
29.4
通讯作者：
Chen, Xianzhong
中科院分区：
文献类型：
--
作者：
Zang, Xiaofei;Dong, Fengliang;Chen, Xianzhong
光学亚表面在光的相位、强度和偏振分布的局部操纵方面显示出前所未有的能力，为高密度光存储、全息照相和显示等应用提供了一种新的可行技术。在这里，展示了一种新的亚表面平台，用于同时将颜色和强度信息编码到光束的波长相关的偏振分布中。与通过相位或幅度调制对图像进行编码的典型元表面设备不同，这里的彩色图像被多路复用到几组偏振简档中，每组偏振简档对应于不同的颜色，这进一步允许偏振调制引起的附加颜色混合。这种独特的方法结合了波长选择性和任意偏振控制，精确到单个亚波长像素级别。偏振和颜色的编码方法可能为具有对亮度和对比度的精细控制的新颖、有效的彩色显示元件开辟新的途径，并可能对高密度数据存储、信息安全和防伪造产生重大影响。
Optical metasurfaces have shown unprecedented capabilities in the local manipulation of the light's phase, intensity, and polarization profiles, and represent a new viable technology for applications such as high-density optical storage, holography and display. Here, a novel metasurface platform is demonstrated for simultaneously encoding color and intensity information into the wavelength-dependent polarization profile of a light beam. Unlike typical metasurface devices in which images are encoded by phase or amplitude modulation, the color image here is multiplexed into several sets of polarization profiles, each corresponding to a distinct color, which further allows polarization modulation-induced additive color mixing. This unique approach features the combination of wavelength selectivity and arbitrary polarization control down to a single subwavelength pixel level. The encoding approach for polarization and color may open a new avenue for novel, effective color display elements with fine control over both brightness and contrast, and may have significant impact for high-density data storage, information security, and anticounterfeiting.