Li Jianxiong, Chen Yiqin, Hu Yueqiang, Duan Huigao, Liu Na
Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart, Germany.
State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, College of Mechanical and Vehicle Engineering, Hunan University, 410082 Changsha, People's Republic of China.
ACS Nano. 2020 Jul 28;14(7):7892-7898. doi: 10.1021/acsnano.0c01469. Epub 2020 Apr 13.
Metasurface-based color display and holography have greatly advanced the state of the art display technologies. To further enrich the metasurface functionalities, recently a lot of research endeavors have been made to combine these two display functions within a single device. However, so far such metasurfaces have remained static and lack tunability once the devices are fabricated. In this work, we demonstrate a dynamic dual-function metasurface device at visible frequencies. It allows for switching between dynamic holography and dynamic color display, taking advantage of the reversible phase transition of magnesium through hydrogenation and dehydrogenation. Spatially arranged stepwise nanocavity pixels are employed to accurately control the amplitude and phase of light, enabling the generation of high-quality color prints and holograms. Our work represents a paradigm toward compact and multifunctional optical elements for future display technologies.
基于超表面的彩色显示和全息技术极大地推动了显示技术的发展。为了进一步丰富超表面的功能，最近人们进行了大量研究，试图在单个设备中结合这两种显示功能。然而，到目前为止，这类超表面一旦制造完成就保持静态且缺乏可调性。在这项工作中，我们展示了一种可见光频率下的动态双功能超表面器件。它利用镁通过氢化和脱氢的可逆相变，实现动态全息和动态彩色显示之间的切换。采用空间排列的阶梯式纳米腔像素精确控制光的振幅和相位，从而能够生成高质量的彩色图像和全息图。我们的工作代表了未来显示技术中紧凑多功能光学元件的一种范例。
