Dual-Band Plasmonic Perfect Absorber Based on Graphene Metamaterials for Refractive Index Sensing Application

Dual-Band Plasmonic Perfect Absorber Based on Graphene Metamaterials for Refractive Index Sensing Application

We demonstrate a dual-band plasmonic perfect absorber (PA) based on graphene metamaterials. Two absorption peaks (22.5 μm and 74.5 μm) with the maximal absorption of 99.4% and 99.9% have been achieved, respectively. We utilize this perfect absorber as a plasmonic sensor for refract...

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Bibliographic Details
Main Authors: Zao Yi, Cuiping Liang, Xifang Chen, Zigang Zhou, Yongjian Tang, Xin Ye, Yougen Yi, Junqiao Wang, Pinghui Wu
Format: Article
Language:English
Published: MDPI AG 2019-07-01
Series:Micromachines
Subjects:
surface plasmon resonance
graphene
refractive index sensor
metamaterials
Online Access:https://www.mdpi.com/2072-666X/10/7/443
Description
Summary:We demonstrate a dual-band plasmonic perfect absorber (PA) based on graphene metamaterials. Two absorption peaks (22.5 μm and 74.5 μm) with the maximal absorption of 99.4% and 99.9% have been achieved, respectively. We utilize this perfect absorber as a plasmonic sensor for refractive index (RI) sensing. It has the figure of merit (FOM) of 10.8 and 3.2, and sensitivities of about 5.6 and 17.2 μm/RIU, respectively. Hence, the designed dual-band PA-based RI sensor exhibits good sensing performance in the infrared regime, which offers great potential applications in various biomedical, tunable spectral detecting, environmental monitoring and medical diagnostics.
ISSN:2072-666X

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