Energy Levels of Coupled Plasmonic Cavities

We demonstrate the hybridization of the plasmonic modes in directly coupled whispering gallery cavities fabricated on silver films and present the mode patterns and energy levels using cathodoluminescence spectroscopy. Although the energy of the most antisymmetrically coupled modes is higher than th...

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Bibliographic Details
Published in:Chinese physics letters 2016-08, Vol.33 (8), p.113-117
Main Author: 刘传普 朱新利 张家森 徐军 王亚敏 俞大鹏
Format: Article
Language:English
Subjects:
Condensed Matter
Materials Science
Physics
反对称
发光光谱
模态能量
直接耦合
耦合模式
能量利用
能量水平
表面等离子体激元
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Summary:We demonstrate the hybridization of the plasmonic modes in directly coupled whispering gallery cavities fabricated on silver films and present the mode patterns and energy levels using cathodoluminescence spectroscopy. Although the energy of the most antisymmetrically coupled modes is higher than that of the corresponding symmetrically coupled ones, the contrary cases happen for small quantum number modes. We attribute the phenomenon to the different surface plasmon polariton paths between the symmetrically and antisymmetrically coupled modes; These results provide an understanding of the resonant properties in coupled plasmonic cavities, which have potential applications in nanophotonic devices.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/33/8/087303