title: Complete surface plasmon-polariton band gap and gap-governed waveguiding, bending and splitting.
abstract: We show theoretically that a complete band gap for surface plasmon-polaritons (SPPs) can exist in a flat metal surface coated with a two-dimensional periodic array of dielectric cylinders. Based on the SPP band gap, gap-governed SPP waveguides, bends and splitters at telecom wavelengths can be achieved by introducing line defects. Numerical simulations show that the proposed SPP waveguides have a very low loss, while SPP bends and splitters can bend and split guided SPPs efficiently. The proposed SPP waveguides, bends and splitters could thus be exploited to construct compact integrated optical circuits in the emerging field of plasmonics.
authors.affiliation: Surface Physics Laboratory and Department of Physics, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Fengqin
authors.initials: F
authors.lastname: Wu
authors.forename: Dezhuan
authors.initials: D
authors.lastname: Han
authors.forename: Xinhua
authors.initials: X
authors.lastname: Hu
authors.forename: Xiaohan
authors.initials: X
authors.lastname: Liu
authors.forename: Jian
authors.initials: J
authors.lastname: Zi