The Goos-Hänchen effect for surface plasmon polaritons

F. Huerkamp, T.A. Leskova, A.A. Maradudin, B. Baumeier

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Abstract

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 ε1(ω) when it is incident on a planar interface with a coplanar metal surface whose dielectric function is ε2(ω). When the surface of incidence is optically more dense than the surface of scattering, i.e. when |ε2(ω))| "|ε1(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-Hanchen 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.

Original languageEnglish
Pages (from-to)15483-15489
Number of pages7
JournalOptics Express
Volume19
Issue number16
DOIs
Publication statusPublished - 1 Aug 2011
Externally publishedYes

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