Fano Resonances in Ag-Air-SiO2 Nanostructure

LI Shu; LIU Huang-qing; CHONG Gui-shu; CHEN Shu-guang; ZHAI Xiang; XIAO Shi-fang; ZOU Yang

doi:10.3788/fgxb20194009.1096

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Fano Resonances in Ag-Air-SiO₂ Nanostructure

Synthesis and Properties of Materials | 更新时间：2020-08-12

- Fano Resonances in Ag-Air-SiO₂ Nanostructure
- Chinese Journal of Luminescence Vol. 40, Issue 9, Pages: 1096-1101(2019)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China(51571088)
- DOI：10.3788/fgxb20194009.1096
  CLC： O402
- Received：18 December 2018，
  
  Revised：22 February 2019，
  
  Published Online：14 March 2019，
  
  Published：05 September 2019
- 稿件说明：
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李沭, 刘晃清, 崇桂书等. Ag-SiO2纳米结构中的法诺共振[J]. 发光学报, 2019,40(9): 1096-1101

LI Shu, LIU Huang-qing, CHONG Gui-shu etc. Fano Resonances in Ag-Air-SiO2 Nanostructure[J]. Chinese Journal of Luminescence, 2019,40(9): 1096-1101
李沭, 刘晃清, 崇桂书等. Ag-SiO2纳米结构中的法诺共振[J]. 发光学报, 2019,40(9): 1096-1101 DOI： 10.3788/fgxb20194009.1096.

LI Shu, LIU Huang-qing, CHONG Gui-shu etc. Fano Resonances in Ag-Air-SiO2 Nanostructure[J]. Chinese Journal of Luminescence, 2019,40(9): 1096-1101 DOI： 10.3788/fgxb20194009.1096.

摘要

利用FDTD研究了Ag-SiO

纳米结构的法诺共振。m

（

=2，3）模的共振峰随银膜水平长度

的增长而红移。法诺共振与银-空气、SiO

周期结构和SiO

有关。随着SiO

横向长度

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-

'）密切相关。在非周期性Ag-空气-氧化硅结构中，当-

'=4 000和-

'=6 000时，可以观察到明显的法诺共振。

Abstract

Fano resonances in Ag-Air-SiO

nanostructure were investigated by Finite-difference time-domain (FDTD). It could be observed a redshift with the growth of horizontal length

of silver film for the resonance peaks of the modes m

(

3). Fano resonance was related with the Ag-Air-SiO

periodic structure and SiO

. The modes m

(

3) presented a redshift and the Fano was becoming more and more obvious with the increment of transverse length

of SiO

. 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 -

'=4 000 and -

'=6 000 in the aperiodic Ag-Air-SiO

structure.

关键词

Keywords

references

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