Numerical investigation on dielectric-metal based dual narrowband visible absorber

被引：5
|
作者：
Zhang, Ke [1 ,2 ]
Deng, Ruixiang [1 ,2 ]
Song, Lixin [1 ,2 ]
Zhang, Tao [1 ,2 ]
机构：
[1] Chinese Acad Sci, Key Lab Inorgan Coating Mat CAS, Shanghai Inst Ceram, Shanghai 200050, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
来源：
MATERIALS RESEARCH EXPRESS | 2019年 / 6卷 / 11期
关键词：
metamaterial; narrowband absorber; refractive index sensing; NEGATIVE REFRACTION; PERFECT ABSORBER; METAMATERIAL; ABSORPTION;
D O I：
10.1088/2053-1591/ab5129
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We propose a dual narrowband perfect visible absorber using periodic dielectric nanoring arrays on aluminum film. This nanostructure can reduce the oxidation problem that noble metal nanostructure is facing. In the designed structure, the resonance peak I corresponds to the first order grating mode, and the resonance peak II is due to the combination of SPP mode, SLR mode and the guide mode. For the application as refractive index sensor, the sensitivity of the two resonance modes is almost the same, and the figure of merit (FOM) of the resonance I and II are 21.8/RIU and 3.5/RIU, respectively. The narrowband perfect absorber has potential applications in sensing application.
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收藏
页数：7
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