Electrically Tunable Damping of Plasmonic Resonances with Graphene

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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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.
Original languageEnglish
JournalNano Letters
Volume12
Issue number10
Pages (from-to)5202–5206
ISSN1530-6984
DOIs
StatePublished - 2012
Peer-reviewedYes
CitationsWeb of Science® Times Cited: 73

Keywords

  • Graphene, Plasmonics, Tunable resonances, Interband losses
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