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Updated: Mar 1, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Electromagnetic field coupling characteristics in graphene plasmonic oligomers: from isolated to collective modes
Junbo Ren1, Weibin Qiu, Houbo Chen
1Fujian Key Laboratory of Light Propagation and Transformation (Huaqiao University), No. 668, Jimei Avenue, Jimei District, Xiamen 361021, China. wbqiu@hqu.edu.cn.
Abstract:
In this paper, we propose a plasmonic tetramer composed of coupled graphene nanodisks. The transformation from the isolated to the collective modes of the proposed structure is investigated by analysing the whispering-gallery modes and extinction spectra with various inter-nanodisk gap distances. In addition, the effect of introducing a central nanodisk into the tetramer on the extinction spectra is explored, which leads to Fano resonance. Furthermore, the refractive index sensing properties of the proposed graphene plasmonic oligomer have been demonstrated. The proposed nanostructures might pave the road toward the application of graphene plasmonic oligomers in fields such as nanophotonics, and chemical or biochemical sensing.
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