Direct photonic - Plasmonic coupling and routing in single nanowires

Ruoxue Yan, Peter Pausauskie, Jiaxing Huang, Peidong Yang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

144 Scopus citations

Abstract

Metallic nanoscale structures are capable of supporting surface plasmon polaritons (SPPs), propagating collective electron oscillations with tight spatial confinement at the metal surface. SPPs represent one of the most promising structures to beat the diffraction limit imposed by conventional dielectric optics. Ag nanowires have drawn increasing research attention due to 2D sub-100 nm mode confinement and lower losses as compared with fabricated metal structures. However, rational and versatile integration of Ag nanowires with other active and passive optical components, as well as Ag nanowire based optical routing networks, has yet to be achieved. Here, we demonstrate that SPPs can be excited simply by contacting a silver nanowire with a SnO2 nanoribbon that serves both as an unpolarized light source and a dielectric waveguide. The efficient coupling makes it possible to measure the propagationdistance-dependent waveguide spectra and frequency-dependent propagation length on a single Ag nanowire. Furthermore, we have demonstrated prototypical photonic-plasmonic routing devices, which are essential for incorporating low-loss Ag nanowire waveguides as practical components into high-capacity photonic circuits.

Original languageEnglish (US)
Pages (from-to)21045-21050
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume106
Issue number50
DOIs
StatePublished - Dec 15 2009

Keywords

  • Ag nanowires
  • Propagation length
  • SnO nanoribbons
  • Subwavelength
  • Waveguides

ASJC Scopus subject areas

  • General

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