Retarded long-range interaction in split-ring-resonator square arrays

TitleRetarded long-range interaction in split-ring-resonator square arrays
Publication TypeJournal Article
Year of Publication2011
AuthorsDecker M, Feth N, Soukoulis CM, Linden S, Wegener M
Journal TitlePhysical Review B
Date Published08
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000294227700010
Keywordsgrains, optical-activity, photonic metamaterials

We systematically investigate the optical extinction spectra of planar gold split-ring-resonator square arrays operating at similar to 200-THz frequency versus the lattice constant and versus angle of incidence. We find a strong dependence of the resonance damping on the in-plane wave vector, namely, the resonance damping increases (decreases) versus the in-plane wave vector for small lattice constants (large lattice constants). By comparison with two simple one-dimensional models as well as with more complete numerical calculations, this behavior is interpreted in terms of a long-range retarded interaction among the split-ring resonators. In contrast, the assumptions of only nearest-neighbor interaction and/or of an instantaneous interaction lead to a striking disagreement with the overall experimental facts.

Alternate JournalPhys. Rev. B