By use of the extinction theorem, the induced electric surface currents involved in electromagnetic scattering and absorption by thin finite wires with arbitrary material parameters are found to be describable by the standard Pocklington integral equation. Unlike for the usual computation, however, when the wire is not highly conducting the scattered wave is described by surface distributions of both electric and magnetic currents, and more than one value of surface impedance may be required. The equation is solved for normal incidence by Galerkin’s method using a single trial function, and results are confirmed by comparison with independent analytical and numerical computations for both coated and uncoated wires.
© 1998 Optical Society of America
[Optical Society of America ]
P. C. Waterman and J. C. Pedersen, "Scattering by finite wires of arbitrary ε, μ, and σ," J. Opt. Soc. Am. A 15, 174-184 (1998)