title: Optical reflection modulation using surface plasmon resonance in a graphene-embedded hybrid plasmonic waveguide at an optical communication wavelength.
abstract: We propose a high-performance, graphene-based optical modulator with a surface plasmon resonance (SPR) at 1550 nm. In the proposed device, a graphene layer is embedded in a hybrid plasmonic waveguide to enhance the light-graphene interaction. The adjustment of the permittivity of the graphene causes a significant modulation of the absorption in the SPR through a variation of the field confinement in the graphene layer, in addition to a resonant angle shift. With an optimal thickness of a metal (Ag) film and the properly chosen operation point of the Fermi level of graphene, a modulation depth of ∼100% was achieved. As the number of graphene layers in the proposed device increases, the insertion loss decreases. With five-layer graphene, a 6% insertion loss was achieved.
authors.forename: Myunghwan
authors.initials: M
authors.lastname: Kim
authors.forename: Chang Yeong
authors.initials: CY
authors.lastname: Jeong
authors.forename: Hyungjun
authors.initials: H
authors.lastname: Heo
authors.forename: Sangin
authors.initials: S
authors.lastname: Kim