期刊
SCIENCE
卷 368, 期 6496, 页码 1219-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.abb1570
关键词
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资金
- U.S. Air Force Office of Scientific Research (AFOSR) [FA9550-12-1-0491, FA9550-18-1-0187]
- AFOSR Foldable and Adaptive 2D Electronics Multidisciplinary University Research Initiative [FA9550-15-1-0514]
- European Commission through the project GrapheneDriven Revolutions in ICT and Beyond
- COMPETE 2020, PORTUGAL 2020, FEDER,
- Portuguese Foundation for Science and Technology (FCT) [POCI-01-0145-FEDER-028114]
- Government of Catalonia through an SGR grant
- Spanish Ministry of Economy and Competitiveness [SEV-2015-0522]
- Fundacio Cellex Barcelona
- Generalitat de Catalunya through the CERCA program
- Mineco grant Plan Nacional [FIS2016-81044-P]
- Agency for Management of University and Research Grants (AGAUR) [2017 SGR 1656]
- European Union [785219, 881603]
- ERC TOPONANOP [726001]
Acoustic graphene plasmons are highly confined electromagnetic modes carrying large momentum and low loss in the mid-infrared and terahertz spectra. However, until now they have been restricted to micrometer-scale areas, reducing their confinement potential by several orders of magnitude. Using a graphene-based magnetic resonator, we realized single, nanometer-scale acoustic graphene plasmon cavities, reaching mode volume confinement factors of similar to 5 x 10(10). Such a cavity acts as a mid-infrared nanoantenna, which is efficiently excited from the far field and is electrically tunable over an extremely large broadband spectrum. Our approach provides a platform for studying ultrastrong-coupling phenomena, such as chemical manipulation via vibrational strong coupling, as well as a path to efficient detectors and sensors operating in this long-wavelength spectral range.
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