Long-range surface plasmon polaritons propagating on a dielectric waveguide support

W. Mu*, J. B. Ketterson

*Corresponding author for this work

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

In the traditional long-range surface plasmon geometry, an ultrathin metal film is sandwiched between two layers having identical dielectric constants. Here we demonstrate the long-range surface plasmon polariton (LRSPP) properties for a new structure where a thin layer with a dielectric constant exceeding that of the surroundings is inserted within the sandwich, provided the layer thickness d satisfies the condition k⊥d = mπ where k⊥ is the component of the guide wavevector perpendicular to the layer and m is an integer. The resulting plasmon modes have smaller losses and nearly the same phase velocity as the original LRSPP. This provides a strategy to support silver films having thicknesses of 10's of nanometers to create plasmonic devices for sensor applications.

Original languageEnglish (US)
Pages (from-to)4713-4715
Number of pages3
JournalOptics Letters
Volume36
Issue number23
DOIs
StatePublished - Dec 1 2011

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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