title: Multiband plasmonic absorber based on transverse phase resonances.
abstract: We demonstrate a multiband plasmonic absorber based on transverse phase resonances. We show that the modification of conventional metallic surfaces of T-shape grooves can cause mode splitting of the plasmonic waveguide cavity modes due to lattice scattering and all the new resonant modes exhibit large absorbtivity greater than 90%. Some of the generated absorption peaks have wide-angle characteristics. Furthermore, we find that the proposed structure is fairly insensitive to the alignment error between different layers.
authors.affiliation: Colledge of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China. yanxiacui@gmail.com
authors.forename: Yanxia
authors.initials: Y
authors.lastname: Cui
authors.forename: Kin Hung
authors.initials: KH
authors.lastname: Fung
authors.forename: Jun
authors.initials: J
authors.lastname: Xu
authors.forename: Sailing
authors.initials: S
authors.lastname: He
authors.forename: Nicholas X
authors.initials: NX
authors.lastname: Fang