title: Gated tunability and hybridization of localized plasmons in nanostructured graphene.
abstract: Graphene has emerged as an outstanding material for optoelectronic applications due to its high electronic mobility and unique doping capabilities. Here we demonstrate electrical tunability and hybridization of plasmons in graphene nanodisks and nanorings down to 3.7 μm light wavelength. By electrically doping patterned graphene arrays with an applied gate voltage, we observe radical changes in the plasmon energy and strength, in excellent quantitative agreement with rigorous analytical theory. We further show evidence of an unexpected increase in plasmon lifetime with growing energy. Plasmon hybridization and electrical doping in nanorings of suitably chosen nanoscale dimensions are key elements for bringing the optical response of graphene closer to the near-infrared, where it can provide a robust, integrable platform for light modulation, switching, and sensing.
authors: Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, United States.
authors: Zheyu
authors: Z
authors: Fang
authors: Sukosin
authors: S
authors: Thongrattanasiri
authors: Andrea
authors: A
authors: Schlather
authors: Zheng
authors: Z
authors: Liu
authors: Lulu
authors: L
authors: Ma
authors: Yumin
authors: Y
authors: Wang
authors: Pulickel M
authors: PM
authors: Ajayan
authors: Peter
authors: P
authors: Nordlander
authors: Naomi J
authors: NJ
authors: Halas
authors: F Javier
authors: FJ
authors: García de Abajo