Quality factor enhancement of plasmonic surface lattice resonance by using asymmetric periods  

作　　者：Yunjie Shi Lei Xiong Yuming Dong Degui Sun Guangyuan Li 石云杰;熊磊;董玉明;孙德贵;李光元(Schools of Science,Changchun University of Science and Technology,Changchun 130022,China;Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China;School of Information Science and Engineering,Yunnan University,Kunming 650500,China)

机构地区：[1]Schools of Science,Changchun University of Science and Technology,Changchun 130022,China [2]Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China [3]School of Information Science and Engineering,Yunnan University,Kunming 650500,China

出　　处：《Chinese Physics B》2022年第1期359-363,共5页中国物理B（英文版）

基　　金：the State Key Laboratory of Advanced Optical Communication Systems and Networks,China(Grant No.2019GZKF2).

摘　　要：We report that using asymmetric lattice periods can enhance the quality factor of plasmonic surface lattice resonances(SLRs)in two-dimensional array of metal-insulator-metal nanopillars in asymmetric dielectric environment.Simulation results show that by adopting appropriate asymmetric lattice periods,the SLR quality factor can be enhanced by 24%compared with the scenario of symmetric periods.We find that the SLR quality factor is optimized when the resonance wavelength is closest to the Rayleigh cutoff wavelength.We also find that the SLRs effect is polarization sensitive in the proposed structure.We expect this work will advance the engineering of SLRs especially in asymmetric dielectric environments,and will promote their applications in sensing.

关 键 词：collective resonance plasmonic nanopillars surface lattice resonance 

分 类 号：O53[理学—等离子体物理]