Zhang Fei, Pu Mingbo, Gao Ping, Jin Jinjin, Li Xiong, Guo Yinghui, Ma Xiaoliang, Luo Jun, Yu Honglin, Luo Xiangang
State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and Electronics Chinese Academy of Sciences Chengdu 610209 China.
Key Laboratory of Optoelectronic Technology and System Ministry of Education Chongqing University Chongqing 400030 China.
Adv Sci (Weinh). 2020 Mar 16;7(10):1903156. doi: 10.1002/advs.201903156. eCollection 2020 May.
Optical metasurfaces enable novel ways to locally manipulate light's amplitude, phase, and polarization, underpinning a newly viable technology for applications, such as high-density optical storage, holography, and displays. Here, a high-security-level platform enabled by centimeter-scale plasmonic metasurfaces with full-color, high-purity, and enhanced-information-capacity properties is proposed. Multiple types of independent information can be embedded into a single metamark using full parameters of light, including amplitude, phase, and polarization. Under incoherent white light, the metamark appears as a polarization- and angle-encoded full-color image with flexibly controlled hue, saturation, and brightness, while switching to multiwavelength holograms under coherent laser illumination. More importantly, for actual applications, the extremely shallow functional layer makes such centimeter-scale plasmonic metamarks suitable for cost-effective mass production processes. Considering these superior performances of the presented multifunctional plasmonic metasurfaces, this work may find wide applications in anticounterfeiting, information security, high-density optical storage, and so forth.
光学超表面为局部操纵光的振幅、相位和偏振提供了新方法，为诸如高密度光存储、全息术和显示器等应用奠定了一种新的可行技术基础。在此，提出了一个由具有全彩色、高纯度和增强信息容量特性的厘米级等离子体超表面实现的高安全级平台。利用光的全参数，包括振幅、相位和偏振，可将多种类型的独立信息嵌入到单个超标记中。在非相干白光下，超标记呈现为具有灵活控制的色调、饱和度和亮度的偏振和角度编码全彩色图像，而在相干激光照明下则切换为多波长全息图。更重要的是，对于实际应用，极浅的功能层使这种厘米级等离子体超标记适用于具有成本效益的大规模生产工艺。考虑到所展示的多功能等离子体超表面的这些优异性能，这项工作可能在防伪、信息安全、高密度光存储等方面有广泛应用。
