Ultraviolet metalens and metalens array of focused vortex beams  

作　　者：张金平 王焱 袁欢 王泽豪 邓阳 黄承志 吴加贵 杨俊波 Jinping Zhang;Yan Wang;Huan Yuan;Zehao Wang;Yang Deng;Chengzhi Huang;Jiagui Wu;Junbo Yang(School of Physical Science and Technology,Southwest University,Chongqing 400715,China;Center of Material Science,National University of Defense Technology,Changsha 410073,China;Key Laboratory of Luminescence Analysis and Molecular Sensing(Southwest University),Ministry of Education,College of Pharmaceutical Sciences,Southwest University,Chongqing 400715,China;College of Artificial Intelligence,Southwest University,Chongqing 400715,China)

机构地区：[1]School of Physical Science and Technology,Southwest University,Chongqing 400715,China [2]Center of Material Science,National University of Defense Technology,Changsha 410073,China [3]Key Laboratory of Luminescence Analysis and Molecular Sensing(Southwest University),Ministry of Education,College of Pharmaceutical Sciences,Southwest University,Chongqing 400715,China [4]College of Artificial Intelligence,Southwest University,Chongqing 400715,China

出　　处：《Chinese Physics B》2023年第6期270-276,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.60907003,61805278,61875168,and 22134005);Chongqing Science Funds for Distinguished Young Scientists(Grant No.cstc2021jcyj-jqX0027);Innovation Research 2035 Pilot Plan of Southwest University(Grant No.SWU-XDPY22012);China Postdoctoral Science Foundation(Grant No.2018M633704);Innovation Support Program for Overseas Students in Chongqing(Grant No.cx2021008);Foundation of NUDT(Grant Nos.JC13-02-13 and ZK17-0301);Hunan Provincial Natural Science Foundation of China(Grant No.13JJ3001);Program for New Century Excellent Talents in University(Grant No.NCET-12-0142);Chongqing Talents Program for Outstanding Scientists(Grant No.cstc2021ycjh-bgzxm0178)。

摘　　要：The solar-blind ultraviolet(UV)wavelength is particularly interesting within the range of 200 nm–300 nm.Here,we propose a focusing metalens,focusing vortex beam(VB)metalens and metalens array that specifically work in the UV band to focus a beam or VB.Firstly,a high numerical aperture(NA)focusing metalens working at a wavelength of 214.2 nm was designed,and the NA reached 0.83.The corresponding conversion efficiency of the unit structure reached as high as 94%,and the full width at half maximum was only 117.2 nm.Metalenses with large NA can act as optical tweezers and can be applied to trap ultracold atoms and molecules.Secondly,a focused VB metalens in the wavelength range of200 nm–300 nm was also designed,which can convert polarized light into a VB and focus the VB simultaneously.Finally,a metalens array was developed to focus VBs with different topological charges on the same focal plane.This series of UV metalenses could be widely used in UV microscopy,photolithography,photonics communication,etc.

关 键 词：metalens METAMATERIALS ultraviolet(UV) vortex beams 

分 类 号：TH74[机械工程—光学工程] TN23[机械工程—仪器科学与技术]