Chen Tianhang, Li Jun, Cai Tong, Liao Dashuang, Guo Lijun, Ruan Yi, Zheng Bin
Appl Opt. 2020 Apr 20;59(12):3660-3665. doi: 10.1364/AO.386811.
Holograms are a promising state-of-the-art technique that are able to reproduce fully three-dimensional images. However, most elementary holograms only recover a nonadjustable image restricted by a certain amplitude and phase. Recently, the concept of the reconfigurable metasurface has come into sight. The reconfigurable metasurfaces can be tuned dynamically through a physics control signal from outside. Here we design and realize a series of novel, to the best of our knowledge, reconfigurable metasurfaces. Using these devices, an advanced metasurface hologram effect could be easier to achieve. Moreover, the reconfigurable property of such tunable metasurface enables independent control of advanced multiplexed channel functionalities to exist in comparison with the conventional static metasurface holograms. Our method creates unprecedented display and virtual effects, and it opens a novel way to a more flexible methodology of dynamic control of electromagnetic waves.
全息图是一种很有前景的先进技术，能够再现完全三维的图像。然而，大多数基本全息图只能恢复受特定幅度和相位限制的不可调节图像。最近，可重构超表面的概念已经出现。可重构超表面可以通过来自外部的物理控制信号进行动态调谐。在此，据我们所知，我们设计并实现了一系列新颖的可重构超表面。使用这些器件，更容易实现先进的超表面全息图效果。此外，与传统的静态超表面全息图相比，这种可调谐超表面的可重构特性能够独立控制先进的复用通道功能。我们的方法创造了前所未有的显示和虚拟效果，并为更灵活的电磁波动态控制方法开辟了一条新途径。
