Open AccessDesign of triple-band metamaterial absorbers with refractive index sensitivity at infrared frequencies
Author(s) -
Jie Xu,
Ziyi Zhao,
Haochi Yu,
Le Yang,
Peng Gou,
Jun Cao,
Yuexin Zou,
Jie Qian,
Tianjun Shi,
Qijun Ren,
Zhenghua An
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.025742
Subject(s) - metamaterial , optics , refractive index , broadband , finite difference time domain method , plasmon , metamaterial absorber , transformation optics , materials science , wavelength , extinction ratio , coupled mode theory , optoelectronics , physics , tunable metamaterials
A triple-band perfect plasmonic metamaterial absorber based on a metal/insulator/metal (MIM) structure is designed. A new freedom through tuning the thicknesses of each ring structures is introduced to realize a quasi-three-dimensional perfect absorber at three extinction wavelengths by using the finite difference time domain method. The physical machine is explained by the time domain field analyses and the coupled mode theory. The characteristics of the absorber make our proposed strategy applicable for the design of more general multiband and broadband perfect absorbers. In addition, these perfect absorbing metamaterials are found to exhibit excellent performance in refractive index sensing.