Surface Bloch waves in metamaterial and metal-dielectric superlattices

Details Surface Bloch waves in metamaterial and metal-dielectric superlattices Surface Bloch waves in metamaterial and metal-dielectric superlattices

2009-06-02

arxiv.org/abs/0906.0404v1

Appl. Phys. Lett. 95, 041902-3 (2009)

Physics

Optics

4 pages, 4 figures

Scientific paper

10.1063/1.3186041

We study the properties of electromagnetic Bloch waves in semi-infinite periodic structures created by alternating metamaterial and dielectric layers. We derive and analyze the dispersion relations in the long-wavelength limit for both TE- and TM-polarized surface Bloch modes, for magnetic metamaterials with negative refraction and metal-dielectric plasmonic superlattices. We reveal that in the subwavelength regime the bulk modes are characterized by three different refractive indices ("tri-refringence") while the surface modes can propagate parallel to the Bloch wavevector and along the interface between superlattice and semi-infinite dielectric.

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