Directional terahertz holography with thermally active Janus metasurface

查看全文 作　　者：Benwen [1,2]Chen;Shengxin [1]Yang;Jian [3]Chen;Jingbo [1,2]Wu;Ke [4]Chen;Weili [1,2]Li;Yihui [1]Tan;Zhaosong [1]Wang;Hongsong [1]Qiu;Kebin [1,2]Fan;Caihong [1,2]Zhang;Huabing [1,2]Wang;Yijun [4]Feng;Yunbin [3]He;Biaobing [1,2]Jin;Xinglong [5]Wu;Jian [3]Chen;Peiheng [1,2]Wu

机构地区：[1]Research Institute of Superconductor Electronics(RISE),School of Electronic Science and Engineering,Nanjing University,Nanjing 210023,China;[2]Purple Mountain Laboratories,Nanjing 211111,China;[3]Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials,Hubei Key Laboratory of Polymer Materials,School of Materials Science and Engineering,Hubei University,Wuhan 430062,China;[4]School of Electronic Science and Engineering,Nanjing University,Nanjing 210023,China;[5]National Laboratory of Solid State Microstructures and School of Physics,Nanjing University,Nanjing 210093,China

出　　处：《Light(Science & Applications)》索引2023年第12卷第6期,共10页

基　　金：This study was supported by the National Key Research and Development Program of China(2017YFA0700202,2021YFB2800701);National Nature Science Foundation of China(62288101,91963128,62071215,62071217,62027807,62035014);Fundamental Research Funds for the Central Universities,and Research Fund for Jiangsu Key Laboratory of Advanced Techniques for Manipulating Electromagnetic Waves.J.W.acknowledges the support from Xiaomi Young Scholar Program. 摘　　要：Dynamic manipulation of electromagnetic(EM)waves with multiple degrees of freedom plays an essential role in enhancing information processing.Currently,an enormous challenge is to realize directional terahertz(THz)holography.Recently,it was demonstrated that Janus metasurfaces could produce distinct responses to EM waves from two opposite incident directions,making multiplexed dynamic manipulation of THz waves possible.Herein,we show that thermally activated THz Janus metasurfaces integrating with phase change materials on the meta-atoms can produce asymmetric transmission with the designed phase delays.Such reconfigurable Janus metasurfaces can achieve asymmetric focusing of THz wave and directional THz holography with free-space image projections,and particularly the information can be manipulated via temperature and incident THz wave direction.This work not only offers a common strategy for realizing the reconfigurability of Janus metasurfaces,but also shows possible applications in THz optical information encryption,data storage,and smart windows. 关键词：directional Directional ASYMMETRIC

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Directional terahertz holography with thermally active Janus metasurface

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