Why Be Positive About Something Negative? Metamaterial-inspired Enhanced Radiating and Scattering Systems

Wednesday, May 02, 2012
7:00 PM
Free and open to the public

Why consider using a material that has negative electric or magnetic properties? Do such materials really exist? Can I buy some? Is this science fiction or what???There have been a number of physics and engineering advances made in the last decade using metamaterials and metamaterial-inspired structures, as well as naturally occurring materials, that have interesting negative electromagnetic (acoustic, quantum mechanical, …) properties, to improve the overall performance characteristics of radiating and scattering systems. Cloaking, highly subwavelength focusing and miniaturized devices are examples of metamaterial applications that have intrigued both scientists and engineers, as well as the general public. A brief review of negative-, zero-, and positive-based, passive and active metamaterial constructs and their interesting practical and exotic applications will be given. The presentation will emphasize how metamaterial-inspired constructs have been engineered to improve the overall performance characteristics of electrically small antenna systems, for example, in the VHF, UHF, microwave and terahertz regimes, as well as nano-antennas in the optical regime.

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Richard Ziolkowski

University of Arizona