Ma Zhan-Ying, Liu Xian-Jin, Peng Yu-Qi, Zhang Da-Sen, Liu Zhen-Zhen, Xiao Jun-Jun
Opt Lett. 2024 Jun 1;49(11):3114-3117. doi: 10.1364/OL.520289.
On-chip integrated metasurface driven by in-plane guided waves is of great interests in various light-field manipulation applications such as colorful augmented reality and holographic display. However, it remains a challenge to design colorful multichannel holography by a single on-chip metasurface. Here we present metasurfaces integrated on top of a guided-wave photonic slab that achieves multi-channel colorful holographic light display. An end-to-end scheme is used to inverse design the metasurface for projecting off-chip preset multiple patterns. Particular examples are presented for customized patterns that were encoded into the metasurface with a single-cell meta-atom, working simultaneously at RGB color channels and for several different diffractive distances, with polarization dependence. Holographic images are generated at 18 independent channels with such a single-cell metasurface. The proposed design scheme is easy to implement, and the resulting device is viable for fabrication, promising plenty of applications in nanophotonics.
由面内导波驱动的片上集成超表面在诸如彩色增强现实和全息显示等各种光场操纵应用中引起了极大的兴趣。然而，通过单个片上超表面设计彩色多通道全息术仍然是一个挑战。在此，我们展示了集成在导波光光子平板顶部的超表面，其实现了多通道彩色全息光显示。采用端到端方案对超表面进行逆向设计，以投射片外预设的多个图案。给出了特定示例，用于将定制图案编码到具有单细胞超原子的超表面中，该超表面在RGB颜色通道同时工作，并针对几种不同的衍射距离，具有偏振依赖性。利用这种单细胞超表面在18个独立通道上生成全息图像。所提出的设计方案易于实现，并且所得器件对于制造是可行的，有望在纳米光子学中有大量应用。
