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

Jing Chen(Southeast University), Hai Nie(Nanjing University of Posts and Telecommunications), Chaojun Tang(Zhejiang University of Technology), Yinhang Cui(Nanjing University of Posts and Telecommunications), Bo Yan(Zhejiang University of Technology), Zhiyuan Zhang(Nanjing University of Posts and Telecommunications), Yurong Kong(Nanjing University of Posts and Telecommunications), Zhi Xu(Zhejiang University of Technology), Pinggen Cai(Zhejiang University of Technology)
Applied Physics Express
April 1, 2019
10.7567/1882-0786/ab14fa
Cited by 111

Abstract

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.

Related Papers

No related papers found

Powered by citation graph analysis