Efficiency-enhanced reflective nanosieve holograms  

作　　者：Samia Osman Hamid Mohammed Dong Zhao Syed Yasir Azeem Xiaoming Goh Shawn J.Tan Jinghua Teng Kun Huang Samia Osman Hamid Mohammed;赵东;Syed Yasir Azeem;Xiaoming Goh;Shawn J.Tan;Jinghua Teng;黄坤(Department of Optics and Optical Engineering,University of Science and Technology of China,Hefei 230026,China;Institute of Materials Research and Engineering,Agency for Science,Technology and Research,Singapore 138634,Singapore)

机构地区：[1]Department of Optics and Optical Engineering,University of Science and Technology of China,Hefei 230026,China [2]Institute of Materials Research and Engineering,Agency for Science,Technology and Research[A*STAR],Singapore 138634,Singapore

出　　处：《Chinese Optics Letters》2022年第5期48-52,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 12134013 and 61875181);USTC Research Funds of the Double First-Class Initiative (No. YD2030002003);Fundamental Research Funds for the Central Universities in China;CAS Poineer Hundred Talents Program the A*STAR IRG grant A2083c0058,CRF grant;the Centre for Micro and Nanoscale Research and Fabrication, University of Science and Technology of China for the support

摘　　要：Photon nanosieves,as amplitude-type metasurfaces,have been demonstrated usually in a transmission mode for optical super-focusing,display,and holography,but the sieves with subwavelength size constrain optical transmission,thus leading to low efficiency.Here,we report reflective photon nanosieves that consist of metallic meta-mirrors sitting on a trans-parent quartz substrate.Upon illumination,these meta-mirrors offer the reflectance of〜50%,which is higher than the transmission of visible light through diameter-identical nanoholes.Benefiting from this configuration,a meta-mirror-based reflective hologram has been demonstrated with good consistence between theoretical and experimental results over the broadband spectrum from 500 nm to 650 nm,meanwhile exhibiting total efficiency of〜7%.Additionally,if an additional high-reflectance layer is employed below these meta-mirrors,the efficiency can be enhanced further for optical anti-counterfeiting.

关 键 词：metasurfaces nanosieves HOLOGRAMS reflective mirrors 

分 类 号：O438.1[机械工程—光学工程] TB383.1[理学—光学]