Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 59: Poster Session II (Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: arrays; Nanostructures at surfaces: Wires, tubes; Nanostructures at surfaces: Other; Plasmonics and nanooptics; Metal substrates: Epitaxy and growth; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsoprtion of organic / bio molecules; Metal substrates: Adsoprtion of inorganic molecules; Metal substrates: Adsoprtion of O and/or H; Metal substrates: Clean surfaces; Density functional theory and beyond for real materials)
O 59.40: Poster
Mittwoch, 24. März 2010, 17:45–20:30, Poster B1
Goos-Hänchen-Effect for a SPP — •Felix Huerkamp1,2, Alexei Maradudin2, and Tamara Leskova2 — 1Westfälische Wilhelms-Universität, Münster — 2Univerity of California, Irvine
When a beam of finite cross section is incident from an optically more dense medium on its planar interface with an optically less dense medium,and the angle of incidence is greater than the critical angle for total internal reflection, the reflected beam undergoes a lateral displacement, as if it is being reflected from a plane in the optically less dense medium parallel to the physical interface. This lateral displacement of the reflected beam is the Goos-Hänchen effect .
We show that a surface plasmon polariton beam can also display a Goos-Hänchen effect.
The system we consider consists of vacuum in the region x3>0, a metal whose dielectric function is є1(ω) in the regions x1<0 , x3<0,and x1>L , x3<0, and a metal whose dielectric function is є2(ω) in the region 0<x1<L , x3<0 (|є1(ω)|<|є2(ω)|). By means of an impedance boundary condition, and solution of the integral equations for the scattering amplitudes to which its use gives rise, by a purely numerical approach and by the Wiener-Hopf method, we determine the reflected surface plasmon polariton beam
when a surface plasmon polariton beam is incident from the region x1<0 on the interface x1=0 at an angle that is greater than the critical angle for total internal reflection. The system where L tends to infinity is also studied in this way. In both of these systems the reflected beam undergoes a lateral shift along the x2 direction whose magnitude is a few times the wavelength of the incident beam.