期刊
SCIENCE
卷 360, 期 6386, 页码 291-295出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aar8438
关键词
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资金
- Spanish Ministry of Economy and Competitiveness, through the Severo Ochoa Programme for Centres of Excellence in RD [SEV-2015-0522]
- Fundacio Cellex Barcelona
- Mineco grants Ramon y Cajal [RYC-2012-12281]
- government of Catalonia through the SGR grant [2014-SGR-1535]
- European Union [604391]
- European Research Council starting grant [307806]
- project GRASP [FP7-ICT-2013-613024-GRASP]
- FPI [BES-2014-068504]
- Portuguese Foundation for Science and Technology (FCT) [UID/FIS/04650/2013]
- Center for Excitonics, an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001088]
- Army Research Office [16112776]
- U.S. Air Force Office of Scientific Research Foldable and Adaptive 2D Electronics Multidisciplinary University Research Initiative [FA9550-15-1-0514]
- [FIS2013-47161-P]
- [FIS2014-59639-JIN]
The ability to confine light into tiny spatial dimensions is important for applications such as microscopy, sensing, and nanoscale lasers. Although plasmons offer an appealing avenue to confine light, Landau damping in metals imposes a trade-off between optical field confinement and losses. We show that a graphene-insulator-metal heterostructure can overcome that trade-off, and demonstrate plasmon confinement down to the ultimate limit of the length scale of one atom. This is achieved through far-field excitation of plasmon modes squeezed into an atomically thin hexagonal boron nitride dielectric spacer between graphene and metal rods. A theoretical model that takes into account the nonlocal optical response of both graphene and metal is used to describe the results. These ultraconfined plasmonic modes, addressed with far-field light excitation, enable a route to new regimes of ultrastrong light-matter interactions.
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