Magnetism and Effective Electromagnetic Parameters from Dielectric Spheres

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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