Berlin 2008 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 27: Photonic crystals III

HL 27.5: Vortrag

Dienstag, 26. Februar 2008, 17:00–17:15, EW 203

The Goos-Hänchen and Imbert-Fedorov shift at metamaterial interfaces — •Thomas Paul, Christoph Menzel, Carsten Rockstuhl, and Falk Lederer — Institut für Festkörpertheorie und -optik, Friedrich-Schiller-Universität Jena, Max-Wien Platz 1, D-07743, Jena, Deutschland

Illuminating an interface separating two half-spaces with a finite beam at an incident angle larger than the critical angle of total internal reflection causes the reflected beam to be translated in space when compared to the incident one. A longitudinal displacement is usually called the Goos-Hänchen shift, a transversal the Imbert-Fedorov shift. Here we will reveal the peculiarities that occur if the reflecting media is not a natural homogenous but an artificial nanostructured media. We investigate at first photonic crystals (PCs). We show that beam shifts observable at such media are deducible from the dispersion relation of the Bloch modes in the infinite PC. As the second part, we will investigate beam shifts at the interfaces of metamaterials (MM), where a simultaneous strong dispersion in the permittivity and permeability can occur in finite spectral domains. Independent of the particular media we investigate at first the necessary symmetry conditions of the beam that have to be met in order to observe any of the shifts or both simultaneously. We present rigorous calculations which are compared to predictions achieved from classical models, namely the Artmann- or the Renard model. We outline configurations which allow observing giant shifts in both geometries, where emphasis is put on a giant Imbert-Fedorov shift.