Electrically tunable damping of plasmonic resonances with graphene

Naresh K. Emani, Ting Fung Chung, Xingjie Ni, Alexander V. Kildishev, Yong P. Chen, Alexandra Boltasseva

Research output: Contribution to journalArticlepeer-review

252 Scopus citations

Abstract

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 (US)
Pages (from-to)5202-5206
Number of pages5
JournalNano letters
Volume12
Issue number10
DOIs
StatePublished - Oct 10 2012

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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