Multicolor waveguide holography remains a challenge due to its inherent design complexity, compounded by the limited low-loss materials available in the optical range as well as challenges in nanofabrication. In this study, we first propose and experimentally demonstrate a multicolor, computer-generated hologram (CGH) in an all-dielectric waveguide metasurface system. Light beams from three different color laser sources (red, green, and blue) are coupled into the waveguide via a single-period grating without any beam splitters or prisms. A multicolor holographic image can be decoupled in the far field through a binary metasurface CGH without any lenses. This technology enables lens-free, ultraminiature augmented and virtual reality displays.

中文翻译：

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平面外计算机生成的多色波导全息图

由于其固有的设计复杂性，加上在光学范围内可用的有限的低损耗材料以及纳米制造的挑战，多色波导全息术仍然是一个挑战。在这项研究中，我们首先提出并通过实验证明了在全介电波导超表面系统中的多色，计算机生成的全息图（CGH）。来自三个不同颜色激光源（红色，绿色和蓝色）的光束通过单周期光栅耦合到波导中，而没有任何分束器或棱镜。多色全息图像可以通过二元超颖表面CGH在远场解耦，而无需任何透镜。这项技术可实现无镜头，超小型增强和虚拟现实显示器。