title: Wideband tunable mid-infrared cross polarization converter using rectangle-shape perforated graphene.
abstract: The strong plasmonic response and wide electrostatic tunability of graphene make it a promising material for developing infrared optoelectronic components. In this paper, we present a mid-infrared wideband tunable cross polarization converter using periodically perforated graphene. The polarization converter consists of a metal ground plane, an insulator layer, and a rectangle-shape periodically perforated graphene sheet. By superimposing two localized surface plasmon modes, the polarization converter transforms a linear polarization to its cross polarization over a bandwidth as wide as ~5% of the central frequency (46.8THz) with a peak conversion ratio exceeding 90%. The polarization conversion performance is maintained over a wide range of incident angles up to 50°, and is highly tunable by electrostatic tuning of the graphene Fermi energy. Our proposed device enables the manipulation of light polarization for potential mid-infrared applications.
authors.forename: Chen
authors.initials: C
authors.lastname: Yang
authors.forename: Yi
authors.initials: Y
authors.lastname: Luo
authors.forename: Jiaxin
authors.initials: J
authors.lastname: Guo
authors.forename: Yang
authors.initials: Y
authors.lastname: Pu
authors.forename: De
authors.initials: D
authors.lastname: He
authors.forename: Yadong
authors.initials: Y
authors.lastname: Jiang
authors.forename: Jimmy
authors.initials: J
authors.lastname: Xu
authors.forename: Zhijun
authors.initials: Z
authors.lastname: Liu