Ag-SiO2纳米结构中的法诺共振（英文）  

Fano Resonances in Ag-Air-SiO2 Nanostructure

作　　者：李沭 刘晃清[1] 崇桂书 陈曙光[1] 翟翔[1] 肖时芳[1] 邹阳[1,2] LI Shu;LIU Huang-qing;CHONG Gui-shu;CHEN Shu-guang;ZHAI Xiang;XIAO Shi-fang;ZOU Yang(School of Physics and Electronics,Hunan University,Changsha 410082,China;Changsha No.1 Railway Middle School,Changsha 410001,China)

机构地区：[1]湖南大学物理与电子学院,湖南长沙410082 [2]长沙市第一铁路中学,湖南长沙410001

出　　处：《发光学报》2019年第9期1096-1101,共6页Chinese Journal of Luminescence

基　　金：国家自然科学基金(51571088)资助项目~~

摘　　要：利用FDTD研究了Ag-SiO 2纳米结构的法诺共振。m j(j=2,3)模的共振峰随银膜水平长度l的增长而红移。法诺共振与银-空气、SiO 2周期结构和SiO 2有关。随着SiO 2横向长度L的增加,法诺现象越来越明显。此外,法诺共振还与银膜的介电常数(实部的负值-ε′m)密切相关。在非周期性Ag-空气-氧化硅结构中,当-ε′m=4 000和-ε′m=6 000时,可以观察到明显的法诺共振。Fano resonances in Ag-Air-SiO 2 nanostructure were investigated by Finite-difference time-domain(FDTD).It could be observed a redshift with the growth of horizontal length l of silver film for the resonance peaks of the modes m j(j=2,3).Fano resonance was related with the Ag-Air-SiO 2 periodic structure and SiO 2.The modes m j(j=2,3)presented a redshift and the Fano was becoming more and more obvious with the increment of transverse length L of SiO 2.In addition,the Fano resonances were also closely related with the permittivity(negative value of the real part)of the silver film.The Fano resonances could be obtained when-ε′m=4 000 and-ε′m=6 000 in the aperiodic Ag-Air-SiO 2 structure.

关 键 词：法诺共振 银-空气-氧化硅 纳米结构 

分 类 号：O402[理学—物理]