Ren Junbo, Qiu Weibin, Chen Houbo, Qiu Pingping, Lin Zhili, Wang Jia-Xian, Kan Qiang, Pan Jiao-Qing
Fujian Key Laboratory of Light Propagation and Transformation (Huaqiao University), No. 668, Jimei Avenue, Jimei District, Xiamen 361021, China.
Phys Chem Chem Phys. 2017 Jun 7;19(22):14671-14679. doi: 10.1039/c7cp01734k.
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.
在本文中，我们提出了一种由耦合石墨烯纳米盘组成的等离子体四聚体。通过分析具有不同纳米盘间间隙距离的回音壁模式和消光光谱，研究了所提出结构从孤立模式到集体模式的转变。此外，还探索了在四聚体中引入中心纳米盘对消光光谱的影响，这导致了法诺共振。此外，还展示了所提出的石墨烯等离子体低聚物的折射率传感特性。所提出的纳米结构可能为石墨烯等离子体低聚物在纳米光子学以及化学或生化传感等领域的应用铺平道路。
