Large effective aperture metalens based on optical sparse aperture system

被引：6
作者：
Liu, Tiecheng [1 ,2 ]
Hu, Jingpei [1 ]
Zhu, Linglin [1 ]
Zhou, Ruyi [1 ,2 ]
Zhang, Chong [1 ,2 ]
Wang, Chinhua [3 ,4 ]
Zeng, Aijun [1 ,2 ]
Huang, Huijie [1 ,2 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Lab Informat Opt & Optoelect Technol, Shanghai 201800, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
[3] Soochow Univ, Key Lab Adv Opt Mfg Technol Jiangsu Prov, Minist Educ, Suzhou 215006, Peoples R China
[4] Soochow Univ, Key Lab Modern Opt Technol, Minist Educ, Suzhou 215006, Peoples R China
来源：
CHINESE OPTICS LETTERS | 2020年 / 18卷 / 10期
基金：
中国国家自然科学基金; 对外科技合作项目（国际科技项目）;
关键词：
optical sparse aperture; metalens; rectangular annular arrays; IMAGE QUALITY; METASURFACES; DESIGNS; PHASE; MTF;
D O I：
10.3788/COL202018.100001
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a kind of large effective aperture metalens based on an optical sparse aperture (OSA) system. Each subaperture of the system is a metalens, which is comprised of just a thin Au film with patterned subwavelength rectangular annular arrays on a SiO2 substrate and has a numerical aperture of 0.46 with a diameter of 21.6 mu m. Ring6 design was selected to enlarge the effective aperture and enhance the spatial resolution. Compared with the absent mid-frequency and high-frequency modulation transfer function of individual metalens, Ring6 can offer a full-frequency band and show a better restored image quality by using Tikhonov regularization.
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页数：4
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