应用光学, 2019, 40 (6): 1045, 网络出版: 2020-02-11  

超表面图像显示技术研究

Study on metasurfaces image display technology
作者单位
武汉大学 电子信息学院, 湖北 武汉 430072
摘要
提出了一种通过超表面实现超高分辨率灰度图像的存储和显示方法。利用金属纳米砖阵列的偏振分光特性, 结合马吕斯定律, 将图像的灰度信息转换为纳米砖阵列中纳米砖的方向角排布, 从而实现精确、连续的灰度调制。实验结果表明, 可在该超表面的反射近场处观测到清晰的灰度图像, 分辨率高达90 714ppi。这种基于超表面的图像显示技术设计方法简单灵活, 且超表面具有体积小、重量轻、结构紧凑、易于集成等优势, 因此可广泛应用于高密度光信息存储, 高端产品防伪, 信息加密等领域。
Abstract
A method for storing and displaying ultra-high resolution grayscale images based on metasurfaces was proposed. Combining the polarization splitting characteristics of the metal nanobricks arrays with Maluss law, the grayscale information of the image was encoded into the arrangement of nanobricks’ orientation angles, thereby realizing accurate and continuous grayscale modulation. Experimental results show that a high fidelity grayscale image can be observed at the near-field of the metasurface with a high resolution of 90 714 ppi. This design method of image processing technology based on metasurfaces, which has the advantages of small volume,light weight, compact structure, and easy integration, is simple and flexible. Therefore, the proposed method indicates the potential in high-density optical information storage, high-end product anti-counterfeiting, information encryption and many other fields.

戴琦, 付娆, 邓联贵, 李嘉鑫, 郑国兴. 超表面图像显示技术研究[J]. 应用光学, 2019, 40(6): 1045. DAI Qi, FU Rao, DENG Liangui, LI Jiaxin, ZHENG Guoxing. Study on metasurfaces image display technology[J]. Journal of Applied Optics, 2019, 40(6): 1045.

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