Channel plasmon polaritons guided by graded gaps: closed-form solutions

Using the effective-index approximation along with the explicit expression for the propagation constant of gap surface plasmons established recently [Opt. Express 16, 2676-2684 (2008)], we develop an analytic description of channel plasmon polariton (CPP) modes guided along V-grooves and gaps betwee...

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Bibliographic Details
Published in:Optics express 2009-06, Vol.17 (12), p.10327-10334
Main Authors: Bozhevolnyi, Sergey I, Nerkararyan, Khachatur V
Format: Article
Language:English
Subjects:
Computer Simulation
Computer-Aided Design
Equipment Design
Equipment Failure Analysis
Light
Metals - chemistry
Models, Theoretical
Photons
Refractometry - instrumentation
Reproducibility of Results
Scattering, Radiation
Sensitivity and Specificity
Surface Plasmon Resonance - instrumentation
Surface Plasmon Resonance - methods
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Summary:Using the effective-index approximation along with the explicit expression for the propagation constant of gap surface plasmons established recently [Opt. Express 16, 2676-2684 (2008)], we develop an analytic description of channel plasmon polariton (CPP) modes guided along V-grooves and gaps between two metal cylindrical surfaces. The results obtained for V-grooves are compared with those reported previously. Dispersion of the main CPP characteristics is calculated for air-gold configurations, allowing one to design graded-gap waveguides for the single-mode operation supporting well-confined fundamental CPP modes in a broad wavelength range.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.17.010327