title: Gold nanobelts as high confinement plasmonic waveguides.
abstract: Plasmon propagation in thin plasmonic waveguides is strongly damped, making it difficult to study with diffraction-limited optics. Here we directly characterize plasmon propagation in gold nanobelts with incoherent light. The data indicate a short average propagation length of 0.94 μm but also reveal a weakly excited antisymmetric mode that has a propagation length greater than 10 μm with strong confinement of 2400 nm(2). These results demonstrate that high confinement and long propagation length can be achieved with thin plasmonic structures.
authors.affiliation: Department of Physics and Astronomy, ‡Department of Chemistry, Rice University , 6100 Main Street, Houston, Texas 77005, United States.
authors.forename: Lindsey J E
authors.initials: LJ
authors.lastname: Anderson
authors.forename: Yu-Rong
authors.initials: YR
authors.lastname: Zhen
authors.forename: Courtney M
authors.initials: CM
authors.lastname: Payne
authors.forename: Peter
authors.initials: P
authors.lastname: Nordlander
authors.forename: Jason H
authors.initials: JH
authors.lastname: Hafner
mesh_terms: D006046:Gold / Q000737:chemistry*; D008027:Light; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology; D055095:Optics and Photonics; D020349:Surface Plasmon Resonance
chemical_list: D006046:Gold