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Metamaterials (so called because of their engineered electromagnetic properties) hold great promise for new applications in the megahertz to terahertz bands, as well as optical frequencies. Examples including super-resolution imaging, cloaking, hyperlensing, and optical transformation. Conventional metamaterials are limited in their ability to demonstrate these phenomena because of their ohmic and dielectric losses and dissipation. However, a new class of metamaterials sidestep these problems and have the added benefit of being much smaller, more tunable, and more nonlinear than their ordinary counterparts.

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