Coupling of Whispering-Gallery Modes in the Graphene Nanodisk Plasmonic Dimers
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- 作者：Weibin Qiu ; Yixin Huang ; Houbo Chen ; Pingping Qiu ; Yixin Tang ; Jia-Xian Wang…
- 关键词：Graphene ; Nanostructures ; Plasmonic ; Coupled resonators
- 刊名：Plasmonics
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：12
- 期：1
- 页码：39-45
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Biotechnology; Nanotechnology; Biophysics and Biological Physics; Biochemistry, general;
- 出版者：Springer US
- ISSN：1557-1963
- 卷排序：12
文摘
In this paper, we proposed plasmonic dimers consisted of two evanescent field coupled graphene monolayer nanodisks. The electromagnetic properties including the split modes with non-degenerate wavelengths, enhancement of the quality factors (Q factors) and mode areas, and the coupling between the fundamental and the first-order whispering-gallery modes are numerically predicted and analyzed systematically. Compared with the single graphene nanodisk, the Q factor of TM4,1 reaches 356 in a dimer with a radius of 5 nm of each nanodisk and an inter-disk gap of 0.4 nm, where the corresponding mode area is as small as 6.88 × 10‐ 5(λ0)2. In addition, the enhanced performances of size-mismatched coupled graphene plasmonic dimers are investigated. This graphene monolayer plasmonic dimer could be one of the fundamental components in the future ultra-high density plasmonic circuit technique, on-chip plasmonic interconnect, and transformation plasmonics. It also could be used as the test-beds for added explorations of cavity quantum electrodynamic experiments.