Journal
NANO LETTERS
Volume 12, Issue 10, Pages 5202-5206Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl302322t
Keywords
Graphene; plasmonics; tunable resonances; interband losses
Categories
Funding
- ARO MURI Grant [56154-PH-MUR (W911NF-09-1-0539)]
- ARO Grant [57566-PHRIP (W911NF-10-1-0380)]
- AFRL Materials and Manufacturing Directorate Applied Metamaterials Program
- NSF [DMR 0847638]
- DTRA [HDTRA1-09-1-0047]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0847638] Funding Source: National Science Foundation
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Dynamic switching of a plasmonic resonance may find numerous applications in subwavelength optoelectronics, spectroscopy, and sensing. Graphene shows a highly tunable carrier concentration under electrostatic gating, and this could provide an effective route to achieving electrical control of the plasmonic resonance. In this Letter, we demonstrate electrical control of a plasmonic resonance at infrared frequencies using large-area graphene. Plasmonic structures fabricated on graphene enhance the interaction of the incident optical field with the graphene sheet, and the impact of graphene is much stronger at mid-infrared wavelengths. Full-wave simulations, where graphene is modeled as a 1 nm thick effective medium, show excellent agreement with experimental results.
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