Chinese Optics Letters, 2020, 18 (10): 100001, Published Online: Aug. 3, 2020
Large effective aperture metalens based on optical sparse aperture system Download: 730次InvitedCover paper
Abstract
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 μm. 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.
Tiecheng Liu, Jingpei Hu, Linglin Zhu, Ruyi Zhou, Chong Zhang, Chinhua Wang, Aijun Zeng, Huijie Huang. Large effective aperture metalens based on optical sparse aperture system[J]. Chinese Optics Letters, 2020, 18(10): 100001.