Journal
OPTICS COMMUNICATIONS
Volume 439, Issue -, Pages 61-65Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2019.01.044
Keywords
Metamaterial; Graphene; Fano resonance; Tunable sensing; Nanoscale
Categories
Funding
- National Natural Science Foundation of China [61675230]
- China Postdoctoral Science Foundation [BX20180353]
- Hundreds of Talents Programs'' of the Chinese Academy of Sciences [J08-029]
- Innovative Project of the Chinese Academy of Sciences [YYYJ-1123-4]
- CAS/SAFEA International Partnership Program for Creative Research Teams, China
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A two-dimensional metamaterial structure consisting of polyimide layer covered by a square disk of monolayer graphene and the gold symmetrical split resonance ring is proposed and investigated. Our simulations indicate that the Fano resonance mode in the terahertz range can be generated by this metamaterial structure, and also utilized for nanoscale sensing. The maximum frequency shift is 1671.61 GHz, and the frequency sensitivity is 1.18 THz/RIU for 2-nm-thick analyte. Furthermore, by adjusting the Fermi level of graphene, the resonance frequency can be tuned actively. Different from the Fano resonance excited by asymmetric structure, the proposed structure is polarization-insensitive and can perform well with both TE and TM waves
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