Highly sensitive refractive-index sensor based on strong magnetic resonance in metamaterials

被引：112

作者：

Chen, Jing ^{[1
,2
,3
]}

Nie, Hai ^{[1
,2
]}

Tang, Chaojun ^{[4
]}

Cui, Yinhang ^{[1
,2
]}

Yan, Bo ^{[4
]}

Zhang, Zhiyuan ^{[1
,2
]}

Kong, Yurong ^{[1
,2
]}

Xu, Zhijun ^{[4
]}

Cai, Pinggen ^{[4
]}

机构：

[1] Nanjing Univ Posts & Telecommun, Coll Elect & Opt Engn, Nanjing 210023, Jiangsu, Peoples R China

[2] Nanjing Univ Posts & Telecommun, Coll Microelect, Nanjing 210023, Jiangsu, Peoples R China

[3] Southeast Univ, State Key Lab Millimeter Waves, Nanjing 210096, Jiangsu, Peoples R China

[4] Zhejiang Univ Technol, Ctr Opt & Optoelect Res, Collaborat Innovat Ctr Informat Technol Biol & Me, Coll Sci, Hangzhou 310023, Zhejiang, Peoples R China

来源：

APPLIED PHYSICS EXPRESS | 2019年 / 12卷 / 05期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

TERAHERTZ METAMATERIAL; ABSORBER;

D O I：

10.7567/1882-0786/ab14fa

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate a very strong magnetic resonance in metamaterials for high-performance sensing. The metamaterials comprise a periodic array of a pair of closely spaced metal nanodisks that are placed on metal substrate. The strong magnetic resonance is essentially an antisymmetric resonant mode resulting from the near-field plasmon hybridization within the pair of metal nanodisks. Because the magnetic resonance has great electromagnetic field enhancement, ultra-narrow bandwidth and nearly perfect absorption, the metamaterials have very high sensitivity (S = 991 nm/RIU, S*= 47/RIU) and figure of merit (FOM = 124, FOM* = 17 702), which may find potential applications in label-free biosensing. (C) 2019 The Japan Society of Applied Physics

引用

页数：4

共 60 条

[1] Thin-film sensing with planar asymmetric metamaterial resonators [J].