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Superlens made of a metamaterial with extreme effective parameters

Silveirinha, M. G. ; Fernandes, C. A. ; Costa, J.R.

Physical Review B Vol. 78, Nº 195121, pp. 1 - 7, November, 2008.

ISSN (print): 1098-0121
ISSN (online): 1098-0121

Journal Impact Factor: 3,736 (in 2014)

Digital Object Identifier: 10.1103/PhysRevB.78.195121

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Abstract
We propose a superlens formed by an ultradense array of crossed metallic wires. It is demonstrated that, due
to the anomalous interaction between crossed wires, the structured substrate is characterized by an anomalously
high index of refraction and supports strongly confined guided modes with very short propagation wavelengths.
It is theoretically proven that a planar slab of such structured material makes a superlens that may
compensate for the attenuation introduced by free-space propagation and restore the subwavelength details of
the source. The bandwidth of the proposed device can be quite significant since the response of the structured
substrate is nonresonant. The theoretical results are fully supported by numerical simulations.