Open AccessAdiabatic bends in surface plasmon polariton band gap structures
Author(s) -
Ilya P. Radko,
Thomas Søndergaard,
Sergey I. Bozhevolnyi
Publication year - 2006
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.004107
Subject(s) - surface plasmon polariton , surface plasmon , optics , wavelength , polariton , adiabatic process , materials science , plasmon , physics , excited state , localized surface plasmon , atomic physics , thermodynamics
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.