The Goos-Hänchen effect for surface plasmon polaritons

By means of an impedance boundary condition and numerical solution of integral equations for the scattering amplitudes to which its use gives rise, we study as a function of its angle of incidence the reflection of a surface plasmon polariton beam propagating on a metal surface whose dielectric func...

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Bibliographic Details
Published in:Optics express 2011-08, Vol.19 (16), p.15483-15489
Main Authors: Huerkamp, Felix, Leskova, Tamara A, Maradudin, Alexei A, Baumeier, Björn
Format: Article
Language:English
Subjects:
Algorithms
Aluminum - chemistry
Computer Simulation
Equipment Design
Gold - chemistry
Models, Statistical
Models, Theoretical
Optics and Photonics
Scattering, Radiation
Surface Plasmon Resonance - methods
Surface Properties
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Summary:By means of an impedance boundary condition and numerical solution of integral equations for the scattering amplitudes to which its use gives rise, we study as a function of its angle of incidence the reflection of a surface plasmon polariton beam propagating on a metal surface whose dielectric function is ɛ1(ω) when it is incident on a planar interface with a coplanar metal surface whose dielectric function is ɛ2(ω). When the surface of incidence is optically more dense than the surface of scattering, i.e. when |ɛ2(ω)|≫|ɛ1(ω)|, the reflected beam undergoes a lateral displacement whose magnitude is several times the wavelength of the incident beam. This displacement is the surface plasmon polariton analogue of the Goos-Hänchen effect. Since this displacement is sensitive to the dielectric properties of the surface, this effect can be exploited to sense modifications of the dielectric environment of a metal surface, e.g. due to adsorption of atomic or molecular layers on it.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.19.015483