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- Title
Dual-Band Plasmonic Perfect Absorber Based on Graphene Metamaterials for Refractive Index Sensing Application.
- Authors
Yi, Zao; Liang, Cuiping; Chen, Xifang; Zhou, Zigang; Tang, Yongjian; Ye, Xin; Yi, Yougen; Wang, Junqiao; Wu, Pinghui
- Abstract
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.
- Subjects
METAMATERIALS; GRAPHENE; REFRACTIVE index; ENVIRONMENTAL monitoring; PATIENT monitoring; SURFACE plasmon resonance
- Publication
Micromachines, 2019, Vol 10, Issue 7, p443
- ISSN
2072-666X
- Publication type
Article
- DOI
10.3390/mi10070443