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 journalArticle

232 Scopus citations


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
Issue number10
StatePublished - Oct 10 2012


All Science Journal Classification (ASJC) codes

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

Cite this

Emani, N. K., Chung, T. F., Ni, X., Kildishev, A. V., Chen, Y. P., & Boltasseva, A. (2012). Electrically tunable damping of plasmonic resonances with graphene. Nano letters, 12(10), 5202-5206. https://doi.org/10.1021/nl302322t