Journal
PHYSICAL REVIEW B
Volume 82, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.82.121102
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Funding
- Department of Energy (Basic Energy Sciences) [DE-AC02-07CH11358]
- European Community [213390]
- Sandia National Laboratories
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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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