Spin-Switched Three-Dimensional Full-Color Scenes Based on a Dielectric Meta-hologram

作者：Hang Feng, Qitong Li, Weiping Wan, Jung-Hwan Song, Qihuang Gong, Mark L. Brongersma, Yan Li · 发表于：ACS Photonics · 年份：2019 · DOI：10.1021/acsphotonics.9b01017 · 被引用次数：64 · 研究领域：Metamaterials and Metasurfaces Applications、Advanced Antenna and Metasurface Technologies、Advanced Optical Imaging Technologies

The possibility to manipulate light fields with metasurfaces can facilitate more compact and efficient devices for encoding computer-generated holograms. However, most of the reconstructed holographic images for reported metasurfaces are either monochromatic or two-dimensional, limiting their applicability. Here, we design and fabricate a silicon metasurface, whose constituent meta-molecules are composed of three different kinds of meta-atoms capable of modulating red, green, and blue light independently. A modified Gerchberg–Saxton algorithm is utilized to retrieve the wavefront for the three-dimensional (3D) hologram. The reconstructed 3D full-color images can be switched by changing the helicity of the illuminating circularly polarized light. The spin-switched 3D full-color scenes greatly increase the information capacity of the device, which may find use in 3D dynamic displays, virtual reality, and data storage applications.