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|Type:||Artigo de periódico|
|Title:||Surface Polaritons On Large-amplitude Gratings|
|Abstract:||We present numerical studies of the dispersion relation for surface polaritons that propagate on the surface of a model free-electron metal upon which a periodic grating has been impressed. The calculations are based on the integral equation formulation of the boundary-value problem, as discussed earlier by Toigo, Marvin, Hill, Celli, and others. We employ the "extinction theorem" scheme, which yields convergent results for values of the ratio 0a far in excess of 0.072, where the Rayleigh-Fano method fails when applied to the scattering of a scalar wave from a hard wall with profile given by 0cos(2xa). We give results for the dispersion relation for two grating profiles, the sinusoidal and the symmetric sawtooth forms. © 1981 The American Physical Society.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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