期刊
ACS NANO
卷 7, 期 12, 页码 11409-11419出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn405367e
关键词
graphene; plasmons; multiple plasmon excitation; electron energy loss; quantum plasmonics; nanophotonics
类别
资金
- Spanish MEC [MAT2010-14885]
- EC [CNECT-ICT-604391]
- ICREA Funding Source: Custom
We show that free electrons can efficiently excite plasmons in doped graphene with probabilities in the order of one per electron. More precisely, we predict multiple excitations of a single confined plasmon mode in graphene nanostructures. These unprecedentedly large electron-plasmon couplings are explained using a simple scaling law and further investigated through a general quantum description of the electron plasmon interaction. From a fundamental viewpoint, multiple plasmon excitations by a single electron provide a unique platform for exploring the bosonic quantum nature of these collective modes. Not only does our study open a viable path toward multiple excitation of a single plasmon mode by a single electron, but it also reveals electron probes as ideal tools for producing, detecting, and manipulating plasmons in graphene nanostructures.
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