The magnetic response of graphene split-ring metamaterials  

作　　者：Nikitas Papasimakis Sukosin Thongrattanasiri Nikolay I Zheludev FJ Garcıa de Abajo 

机构地区：[1]Optoelectronics Research Centre and Centre for Photonic Metamaterials,University of Southampton,Southampton,UK [2]IQFR–CSIC,Serrano 119,28006 Madrid,Spain [3]Centre for Disruptive Photonic Technologies,Nanyang Technological University,Singapore [4]ICFO–Institut de Ciencies Fotoniques,Mediterranean Technology Park,08860 Castelldefels(Barcelona),Spain

出　　处：《Light(Science & Applications)》2013年第1期124-127,共4页光（科学与应用)（英文版）

基　　金：This work has been supported by the Spanish MICINN(MAT2010-14885 and Consolider NanoLight.es);the European Commission(FP7-ICT-2009-4-248909-LIMA and FP7-ICT-2009-4-248855-N4E);the EPSRC(UK)and the Leverhulme Trust and the MOE Singapore(grant MOE2011-T3-1-005).

摘　　要：Graphene has emerged as a promising platform for THz plasmonics,allowing high confinement,long lifetimes and fast electrical tunability.Here,we predict a strong magnetic dipole response by graphene split nanorings at THz frequencies,allowing the attainment of metamaterials with a high degree of field confinement(approximately one hundredth of the excitation wavelength)that is not reachable with conventional noble metals.The magnetic response of highly doped graphene split-rings in the far-infrared is much stronger than that displayed by gold structures of similar thicknesses.We further explored stacked graphene layers as a practical way of producing high-frequency magnetism in thin,electrically tunable metamaterials.Our results support the great potential of using graphene to achieve electrically tunable magnetic metamaterials.

关 键 词：artificial magnetism GRAPHENE graphene plasmons METAMATERIALS PLASMONICS 

分 类 号：TB3[一般工业技术—材料科学与工程]