title: Single-mode graphene-coated nanowire plasmonic waveguide.
abstract: We propose in this Letter a single-mode graphene-coated nanowire surface plasmon waveguide. The single-mode condition and modal cutoff wavelength of high order modes are derived from an analytic model and confirmed by numerical simulation. The mode number diagram of the proposed waveguide in the wavelength-radius space is also demonstrated. By changing the Fermi level of graphene, the performance of the proposed waveguide could be tuned flexibly, offering potential application in tunable nanophotonic devices.
authors.forename: Yixiao
authors.initials: Y
authors.lastname: Gao
authors.forename: Guobin
authors.initials: G
authors.lastname: Ren
authors.forename: Bofeng
authors.initials: B
authors.lastname: Zhu
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.forename: Shuisheng
authors.initials: S
authors.lastname: Jian