Self-consistent calculations of loss-compensated fishnet metamaterials

TitleSelf-consistent calculations of loss-compensated fishnet metamaterials
Publication TypeJournal Article
Year of Publication2010
AuthorsFang A, Koschny T, Soukoulis CM
Journal TitlePhysical Review B
Date Published09/09
ISBN Number1098-0121
Accession NumberISI:000281658500001
KeywordsGAIN, negative-index metamaterials, refractive-index

We present a computational approach, allowing for a self-consistent treatment of three-dimensional fishnet metamaterial coupled to a gain material incorporated into the nanostructure. We show numerically that one can compensate the losses by incorporating gain material inside the fishnet structure. The pump rate needed to compensate the loss is much smaller than the bulk gain and the figure of merit [FOM=vertical bar Re(n)/Im(n)vertical bar] increases dramatically with the pump rate. Transmission, reflection, and absorption data, as well as the retrieved effective parameters, are presented for the fishnet structure with and without gain material. Kramers-Kronig relations of the effective parameters are in excellent agreement with the retrieved results with gain.

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