Active digital spoof plasmonics

查看全文 作　　者：Hao Chi [1,2]Zhang;Tie Jun [1]Cui;Yu [2]Luo;Jingjing [1]Zhang;Jie [1]Xu;Pei Hang [1]He;Le Peng [1]Zhang

机构地区：[1]State Key Laboratory of Millimeter Waves,Southeast University,Nanjing 210096,China;[2]The Photonics Institute and Centre for Optoelectronics and Biophotonics,School of Electrical and Electronic Engineering,Nanyang Technological University,Singapore 639798,Singapore

出　　处：《National Science Review》索引2020年第7卷第2期,共9页

基　　金：supported by the National Natural Science Foundation of China(61871127,61631007,61571117,61501112,61501117,61522106,61731010,61735010,61722106,61701107,61701108 and 61701246);the National Key Research&Development Program of China(2017YFA0700200 and 2017YFA0700201);Fundamental Research Funds for the Central Universities(22442018R30001);the Overseas Expertise Introduction Project for Discipline Innovation(111–2-05);the Singapore Ministry of Education Academic Research Fund TIER 1(2017-T1–001-239(RG91/17(S)))and TIER 2(MOE 2018-T2–2-189(S));A*Star AME programmatic grant(A18A7b0058). 摘　　要：Digital coding and digital modulation are the foundation of modern information science.The combination of digital technology with metamaterials provides a powerful scheme for spatial and temporal controls of electromagnetic waves.Such a technique,however,has thus far been limited to the control of free-space light.Its application to plasmonics to shape subwavelength fields still remains elusive.Here,we report the design and experimental realization of a tunable conformal plasmonic metasurface;which is capable of digitally coding and modulating designer surface plasmons at the deep-subwavelength scale.Based on dynamical switching between two discrete dispersion states in a controlled manner;we achieve digital modulations ofboth amplitude and phase of surface waves with nearly 100%modulation depth on a single device.Our study not only introduces a new approach for active dispersion engineering,but also constitutes an important step towards the realization of subwavelength integrated plasmonic circuits. 关键词：DIGITAL CODING DIGITAL MODULATION PLASMONICS DIGITAL METAMATERIALS

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Active digital spoof plasmonics

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