Decimeter-depth and polarization addressable color 3D meta-holography
Di Wang, Yi-Long Li, Xin‐Ru Zheng, Ruonan Ji, Xin Xie, Kun Song, Fan‐Chuan Lin, N. Li, Zhao Jiang, Chao Liu, Yi‐Wei Zheng, Shaowei Wang, Wei Lu, Baohua Jia, Qiong‐Hua Wang
Abstract
Fueled by the rapid advancement of nanofabrication, metasurface has provided unprecedented opportunities for 3D holography. Large depth 3D meta-holography not only greatly increases information storage capacity, but also enables distinguishing of the relative spatial relationship of 3D objects, which has important applications in fields like optical information storage and medical diagnosis. Although the methods based on Fresnel diffraction theory can reconstruct the real depth information of 3D objects, the maximum depth is only 2 mm. Here, we develop a 3D meta-holography based on angular spectrum diffraction theory to break through the depth limit. By developing the angular spectrum diffraction theory into meta-holography, the metasurface structure with independent polarization control is used to create a polarization multiplexing 3D meta-hologram. The fabricated amorphous silicon metasurface increases the depth range by 47.5 times and realizes 0.95 dm depth reconstruction for polarization independent and different color 3D meta-hologram in visible. Such polarization controlled large-depth color meta-holography is expected to open avenue for data storage, display, information security and virtual reality. The authors present an exciting 3D meta-holography based on angular spectrum diffraction theory that significantly improves depth limits. The showcased amorphous silicon metasurface with independent polarization control herein achieves a 47.5x depth increase and 0.95 dm depth reconstructions for polarization-independent and different color 3D meta-hologram.