M.S. Wheeler, J.S. Aitchison, and M. Mojahedi (Canada)
Metamaterials, magnetism, Mie scattering, polaritonic ma terials, negative permeability, negative group velocity.
The effective electric and magnetic properties are found for a material composed of non-magnetic spheres. These para meters are found in the long-wavelength limit as a function of the frequency, composition, size, and volume density of the spheres. A fundamental resonant magnetic response is found when polaritonic materials are used. The effec tive media parameters are veriļ¬ed by band structure calcu lations. Frequency ranges with negative permeability and negative group velocities are found. This simple composite extends magnetic materials into the infrared regime.
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