Journal
MICROMACHINES
Volume 10, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/mi10070443
Keywords
surface plasmon resonance; graphene; refractive index sensor; metamaterials
Categories
Funding
- National Natural Science Foundation of China (NNSFC) [51606158, 11604311, 11704223]
- Natural Science Foundation of Fujian Province [2018J05008, JZ160459]
- Sichuan Science and Technology Program [2018GZ0521]
- Longshan Academic Talent Research Supporting program of SWUST [18lzx506]
- Postgraduate Innovation Fund Project by the Southwest University of Science and Technology [18ycx034]
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We demonstrate a dual-band plasmonic perfect absorber (PA) based on graphene metamaterials. Two absorption peaks (22.5 mu m and 74.5 mu m) 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 mu m/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.
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