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Adiabatic bends in surface plasmon polariton band gap structures.

Authors
  • Radko, Ilya P
  • Søndergaard, Thomas
  • Bozhevolnyi, Sergey I
Type
Published Article
Journal
Optics Express
Publisher
The Optical Society
Publication Date
May 01, 2006
Volume
14
Issue
9
Pages
4107–4114
Identifiers
PMID: 19516559
Source
Medline
License
Unknown

Abstract

Propagation and interaction of surface plasmon polaritons (SPPs) excited in the wavelength range 700-860 nm with periodic triangular arrays of gold bumps placed on gold film surfaces are investigated using a collection near-field microscope. We observe the inhibition of SPP propagation into the arrays within a certain wavelength range, i.e., the band gap (BG) effect. We demonstrate also the SPP propagation along a 30 degrees bent channel obtained by an adiabatic rotation of the periodic array of scatterers. Numerical simulations using the Lippmann-Schwinger integral equation method are presented and found in reasonable agreement with the experimental results.

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