期刊
NANO LETTERS
卷 18, 期 9, 页码 5913-5918出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b02613
关键词
Graphene plasmonics; plasmonic crystals; SEIRA; large-scale nanopatterning; nanoimprint lithography
类别
资金
- Spanish Ministry of Economy and Competitiveness through the Severo Ochoa Programme for Centres of Excellence in RD [SEV-2015-0522]
- OPTO-SCREEN from Fundacio Privada Cellex [TEC2016-75080-R]
- Generalitat de Catalunya through the CERCA program
- AGAUR [2017 SGR 1634]
- European Union H2020 Programme [696656]
- Danish National Research Foundation (DNRF) Center for Nano structured Graphene [DNRF103]
- EU Horizon 2020 (3DAM) [692527]
Despite its great potential for a wide variety of devices, especially mid-infrared biosensors and photodetectors, graphene plasmonics is still confined to academic research. A major reason is the fact that, so far, expensive and low-throughput lithography techniques are needed to fabricate graphene nanostructures. Here, we report for the first time a detailed experimental study on electrostatically tunable graphene nanohole array surfaces with periods down to 100 nm, showing clear plasmonic response in the range similar to 1300-1600 cm(-1), which can be fabricated by a scalable nanoimprint technique. Such large area plasmonic nanostructures are suitable for industrial applications, for example, surface-enhanced infrared absorption (SEIRA) sensing, as they combine easy design, extreme field confinement, and the possibility to excite multiple plasmon modes enabling multiband sensing, a feature not readily available in nanoribbons or other localized resonant structures.
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