title: Multi-mode Hybrid Plasmonic Waveguides with Enhanced Confinement and Propagation.
abstract: A hybrid waveguide, which consists of a dielectric wire above a dielectric-metal interface, has been previously proposed to achieve high confinement with low loss. By exciting this geometry with an aperture in the metal that takes advantage of the extraordinary transmission through subwavelength apertures, it is possible to strongly couple to multiple modes. The real part of the fundamental mode is in fact capable of exceeding the index of refraction of all the materials used while maintaining a manageable imaginary part, as a result of appropriate choice of materials for the dielectric wire and the metal. In addition, as the confinement of the second mode is comparable to that of the fundamental mode but has a much longer propagation length, this mode can be utilized in light-guiding applications where enhanced confinement and propagation is desired.
authors.affiliation: Department of Physics, College of Liberal Arts and Sciences, St. John's University, 8000 Utopia Parkway, Jamaica, NY 11439 USA ; Department of Physics & Astronomy, University of Southern California, 825 Bloom Walk, Los Angeles, CA 90089 USA.
authors.forename: John
authors.initials: J
authors.lastname: Colanduoni
authors.affiliation: Department of Physics, College of Liberal Arts and Sciences, St. John's University, 8000 Utopia Parkway, Jamaica, NY 11439 USA ; Institute of Optics, University of Rochester, 275 Hutchison Rd., Rochester, NY 14627 USA.
authors.forename: Daniel
authors.initials: D
authors.lastname: Nikolov
authors.affiliation: Department of Physics, College of Liberal Arts and Sciences, St. John's University, 8000 Utopia Parkway, Jamaica, NY 11439 USA.
authors.forename: Huizhong
authors.identifier: 0000-0001-5051-5780
authors.initials: H
authors.lastname: Xu
keywords: Extraordinary transmission; Hybrid waveguide; Subwavelength aperture; Surface plasmons