Ultracompact multifunctional metalens visor for augmented reality displays  

作　　者：Yan Li Shuyi Chen Haowen Liang Xiuying Ren Lingcong Luo Yuye Ling Shuxin Liu Yikai Su Shin‑Tson Wu 

机构地区：[1]Department of Electronic Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [2]State Key Laboratory of Optoelectronic Materials and Technologies,School of Physics,Sun Yat-Sen University,Guangzhou 510275,China [3]College of Optics and Photonics,University of Central Florida,Orlando,FL 32816,USA

出　　处：《PhotoniX》2022年第1期23-37,共15页智汇光学（英文）

基　　金：National Key Research and Development Program(No.2020YFC2007102);National Natural Science Foundation of China(61727808,62075127&12074444);Guangdong Basic and Applied Basic Research Foundation(No.2020A1515011184);Guangzhou Basic and Applied Basic Research Foundation(No.202102020987)for the financial support.

摘　　要：Virtual reality(VR)and augmented reality(AR)have found widespread applications in education,engineering,healthcare,and entertainment.However,these near-eye displays are often bulky and heavy,and thus are not suitable for long-term wearing.Metalenses,with an ultra-thin formfactor,subwavelength modulation scale,and high modulation flexibility,are promising candidates to replace the conventional optics in AR display systems.In this work,we proposed and fabricated a novel reflective dielectric metalens-visor based on Pancharatnam-Berry phase with see-through capability.It achieves diffraction-limited focusing behavior for the reflected red light,while keeping a good transmission spectrum in the visible region.Hence,this single piece metalensvisor can perform the function of two integrated elements simultaneously:an eyepiece and an optical combiner,which in turn greatly reduces the weight and the size of an AR display.We have implemented a proof-of-concept AR display system employing the metalens-visor,and experimentally demonstrated color AR images with good image quality.This work reveals the great potential of multi-functional metasurface devices which enables optical integration in interdisciplinary applications including wearable displays,biological imaging,and aeronautic optical instruments.

关 键 词：Metalens-visor Wearable display Augmented reality See-through metasurface Multi-functional 

分 类 号：TN873[电子电信—信息与通信工程]