Details

Autor(en) / Beteiligte

• Zhou, Jiangfeng
• Koschny, Thomas
• Kafesaki, Maria
• Soukoulis, Costas M.

Titel

Size dependence and convergence of the retrieval parameters of metamaterials

Ist Teil von

• Photonics and nanostructures, 2008-04, Vol.6 (1), p.96-101

Ort / Verlag

New York: Elsevier B.V

Erscheinungsjahr

2008

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We study the dependence of the retrieval parameters, such as the electric permittivity, ϵ , the magnetic permeability, μ , and the index of refraction, n, on the size of the unit cell of a periodic metamaterial. The convergence of the retrieved parameters on the number of the unit cells is also examined. We have concentrated our studies on the so-called fishnet structure, which is the most promising design to obtain negative n at optical wavelengths. We find that as the size of the unit cell decreases, the magnitude of the retrieved effective parameters increases. The convergence of the effective parameters of the fishnet as the number of the unit cells increases is demonstrated but found to be slower than for regular split ring resonators and wires structures. This is due to a much stronger coupling between the different unit cells in the fishnet structure.