Electrically Tunable Damping of Plasmonic Resonances with Graphene

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

  • Author: Emani, Naresh K., United States

    Birck Nanotechnology Center, Purdue University, United States

  • Author: Chung, Ting-Fung, United States

    Birck Nanotechnology Center, Purdue University, United States

  • Author: Ni, Xingjie, United States

    Birck Nanotechnology Center, Purdue University, United States

  • Author: Kildishev, Alexander V., United States

    Birck Nanotechnology Center, Purdue University, United States

  • Author: Chen, Yong P., United States

    Birck Nanotechnology Center, Purdue University, United States

  • Author: Boltasseva, Alexandra

    Plasmonics and Metamaterials, Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads, DK-2800, Kgs. Lyngby, Denmark

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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
Publication date2012
Volume12
Journal number10
Pages5202–5206
ISSN1530-6984
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 29

Keywords

  • Graphene, Plasmonics, Tunable resonances, Interband losses
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