Extremely Sub-wavelength Planar Magnetic Metamaterials

Details Extremely Sub-wavelength Planar Magnetic Metamaterials Extremely Sub-wavelength Planar Magnetic Metamaterials

2011-11-08

arxiv.org/abs/1111.2024v1

Physics

Optics

11 pages, 8 figures

Scientific paper

We present highly sub-wavelength magnetic metamaterials designed for operation at radio frequencies (RFs). A dual layer design consisting of independent planar spiral elements enables experimental demonstration of a unit cell size (a) that is ~ 700 times smaller than the resonant wavelength ({\lambda}0). Simulations indicate that utilization of a conductive via to connect spiral layers permits further optimization and we achieve a unit cell that is {\lambda}0/a ~ 2000. Magnetic metamaterials are characterized by a novel time domain method which permits determination of the complex magnetic response. Numerical simulations are performed to support experimental data and we find excellent agreement. These new designs make metamaterial low frequency experimental investigations practical and suggest their use for study of magneto-inductive waves, levitation, and further enable potential RF applications.

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