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Large effective aperture metalens based on optical sparse aperture system

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【Author】 Tiecheng Liu;Jingpei Hu;Linglin Zhu;Ruyi Zhou;Chong Zhang;Chinhua Wang;Aijun Zeng;Huijie Huang;Laboratory of Information Optics and Optoelectronic Technology, Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences;Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences;Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Laboratory of Modern Optical Technologies of the Ministry of Education, Soochow University;

【通讯作者】胡敬佩;曾爱军;

【机构】 Laboratory of Information Optics and Optoelectronic Technology, Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences； Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences； Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Laboratory of Modern Optical Technologies of the Ministry of Education, Soochow University；

【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 Si O₂ 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.更多还原

【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 Si O₂ 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.更多还原

【关键词】 optical sparse aperture； metalens； rectangular annular arrays；
【Key words】 optical sparse aperture； metalens； rectangular annular arrays；

【基金】 partially supported by the Intergovernmental International Cooperation Program in Science and Technology Innovation (No. 2016YFE0110600);International Science&Technology Cooperation Program of Shanghai (No. 16520710500);National Natural Science Foundation of China (No. 61805264);Youth Innovation Promotion Association CAS;Science and Technology Commission of Shanghai Municipality(No. 17YF1429500);Shanghai Sailing Program(No. 18YF1426500);University Scientific Research Foundation of Jiangsu Province (No. KJS1713)

【文献出处】 Chinese Optics Letters ,中国光学快报(英文版) , 编辑部邮箱 ,2020年10期

【分类号】TH74
【下载频次】30

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