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Electrostatic screening in a wire medium
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DOI：10.1103/PhysRevB.107.115170.png)
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Abstract
En 中文
We extensively study screening in anisotropic artificial media formed by arrays of parallel metal wires both analytically and experimentally. Our findings show that the electrostatic potential distribution produced by probe charge is spherically symmetrical in the vicinity of the source. We also derive a boundary condition for the wire medium and confirm its validity experimentally. Despite the finite dimensions of the wire arrays, the field symmetry near the charge remains unaffected, but a local maximum potential is produced at the boundary. The screening depth of the wire medium is determined by its geometrical parameters and is proportional to the plasma frequency, which leads us to propose an experimental method for defining plasma frequency through static E-field measurement.
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METAMATERIALS