Temperature-responded tunable metalenses based on phase transition materials  

作　　者：Jing-Jun Wu Feng Tang Jun Ma Bing Han Cong Wei Qing-Zhi Li Jun Chen Ning Zhang Xin Ye Wan-Guo Zheng Ri-Hong Zhu 伍景军;唐烽;马骏;韩冰;魏聪;李青芝;陈骏;张宁;叶鑫;郑万国;朱日宏(School of Electronic and Optical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;MIIT Key Laboratory of Advanced Solid Laser,Nanjing University of Science and Technology,Nanjing 210094,China;Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang 621900,China;IFSA Collaborative Innovation Center,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]School of Electronic and Optical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China [2]MIIT Key Laboratory of Advanced Solid Laser,Nanjing University of Science and Technology,Nanjing 210094,China [3]Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang 621900,China [4]IFSA Collaborative Innovation Center,Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Chinese Physics B》2022年第5期416-421,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.61875087);the Innovation and Development Foundation of China Academy of Engineering Physics(Grant No.CX20200020)。

摘　　要：Once the metalenses are fabricated,the functions of most metalenses are invariable.The tunability and reconfigurability are useful and cost-saving for metalenses in realistic applications.We demonstrate this tunability here via a novel hybrid metalens with the strategic placement of an ultra-thin VO;layer.The hybrid metalens is capable of dynamically modulating the focusing intensity of transmitted light at a wavelength of 1550 nm,and demonstrate a 42.28%focusing efficiency of the incident light and 70.01%modulation efficiency.The hybrid metalens’optothermal simulations show an optothermal conversion process of dynamic focusing,and a maximum laser density of 1.76×10^(3)W/cm^(2) can be handled at an ambient temperature lower than 330 K.The hybrid metalens proposed in this work,a light-dose sensitive tunable smart metalens that can protect other instruments/systems or materials from being damaged,has its specific applications such as in anti-satellite blinding,bio-imaging,etc.

关 键 词：temperature-responded tunable metalenses phase change material VO2 

分 类 号：TH74[机械工程—光学工程] TB34[机械工程—仪器科学与技术]