Abstract

Metamaterial structures designed to have simultaneously negative permittivity and permeability are known as left-handed materials. Their complexity and our understanding of their properties have advanced rapidly to the point where direct applications are now viable. We present a radial gradient-index lens with an index of refraction ranging from −2.67 (edge) to −0.97 (center). Experimentally, we find that the lens can produce field intensities at the focus that are greater than that of the incident plane wave. These results are obtained at 10.3GHz and in excellent agreement with full-wave simulations. We also demonstrate an advanced fabrication technique using conventional printed circuit board technology which offers significant design, mechanical, and cost advantages over other microwave lens constructions.

Keywords

MetamaterialLens (geology)OpticsMicrowavePermittivityRefractive indexFabricationGradient-index opticsPlane waveRangingMaterials scienceFree spacePrinted circuit boardNegative refractionPhysicsOptoelectronicsComputer scienceEngineeringTelecommunicationsElectrical engineeringDielectric

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Publication Info

Year
2006
Type
article
Volume
88
Issue
8
Citations
125
Access
Closed

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Tom Driscoll, D. N. Basov, Anthony F. Starr et al. (2006). Free-space microwave focusing by a negative-index gradient lens. Applied Physics Letters , 88 (8) . https://doi.org/10.1063/1.2174088

Identifiers

DOI
10.1063/1.2174088