Lattice plasmon mode excitation via near-field coupling  

作　　者：Yun Lin Shuo Shen Xiang Gao Liancheng Wang 林蕴;申烁;高祥;汪炼成(State Key Laboratory of High Performance Complex Manufacturing,College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China;Xiangya School of Stomatology,Xiangya Stomatological Hospital,Central South University,Changsha 410000,China)

机构地区：[1]State Key Laboratory of High Performance Complex Manufacturing,College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China [2]Xiangya School of Stomatology,Xiangya Stomatological Hospital,Central South University,Changsha 410000,China

出　　处：《Chinese Physics B》2022年第1期344-349,共6页中国物理B（英文版）

基　　金：Key Laboratory of Energy Conversion and Storage Technologies(Southern University of Science and Technology),Ministry of Education,Shenzhen,China,the National Key Research and Development Program of China(Grant No.2018YFB0406702);Professorship Startup Funding(Grant No.217056);Innovation-Driven Project of Central South University(Grant No.2018CX001);Project of State Key Laboratory of High Performance Complex Manufacturing,Central South University(Grant No.ZZYJKT2018-01).

摘　　要：The optical response of metal nanoparticles can be modified through near-field or far-field interaction,yet the lattice plasmon modes(LPMs)considered can only be excited from the latter.Here instead,we present a theoretical evaluation for LPM excitation via the near-field coupling process.The sample is an arrayed structure with specific units composed of upper metal disks,a lower metal hole and a sandwiched dielectric post.The excitation process and underlying mechanism of the LPM and the influence of the structure parameters on the optical properties have been investigated in detail by using a finite-difference time-domain(FDTD)numerical method.Our investigation presented here should advance the understanding of near-field interaction of plasmon modes for LPM excitation,and LPMs could find some potential applications,such as in near-field optical microscopes,biosensors,optical filters and plasmonic lasers.

关 键 词：optical response of metal nanoparticles lattice plasmon modes finite-difference time-domain 

分 类 号：O53[理学—等离子体物理]