Magnesium-Based Metasurfaces for Dual-Function Switching between Dynamic Holography and Dynamic Color Display
Magnesium-Based Metasurfaces for Dual-Function Switching between Dynamic Holography and Dynamic Color Display
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DOI：
10.1021/acsnano.0c01469
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发表时间：
2020-07-28
期刊：
影响因子：
17.1
通讯作者：
Liu, Na
中科院分区：
文献类型：
--
作者：
Li, Jianxiong;Chen, Yiqin;Liu, Na
基于超表面的彩色显示和全息术极大地推进了最先进的显示技术。为了进一步丰富超表面功能，最近已经进行了大量研究工作以将这两种显示功能结合在单个设备中。然而，到目前为止，一旦设备制造出来，这种超表面仍然是静态的并且缺乏可调节性。在这项工作中，我们展示了可见频率下的动态双功能超表面器件。它允许在动态全息和动态彩色显示之间切换，利用镁通过氢化和脱氢的可逆相变。采用空间排列的阶梯式纳米腔像素来精确控制光的振幅和相位，从而能够生成高质量的彩色印刷品和全息图。我们的工作代表了未来显示技术的紧凑型多功能光学元件的范例。
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.