title: Electrically tunable damping of plasmonic resonances with graphene.
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.
authors.affiliation: School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, USA.
authors.forename: Naresh K
authors.initials: NK
authors.lastname: Emani
authors.forename: Ting-Fung
authors.initials: TF
authors.lastname: Chung
authors.forename: Xingjie
authors.initials: X
authors.lastname: Ni
authors.forename: Alexander V
authors.initials: AV
authors.lastname: Kildishev
authors.forename: Yong P
authors.initials: YP
authors.lastname: Chen
authors.forename: Alexandra
authors.initials: A
authors.lastname: Boltasseva