The evolution of surface and leaky waves as a function of frequency is examined for perpendicular polarization [transverse-electric (TEN) modes] in configurations consisting of a dielectric slab bounded by media having different refractive indices. We find that, at any frequency, these waves occur in sets of four types for all higher-order (N > 1) mode numbers. The characteristics and the field patterns of these wave types are discussed, and the special behavior of the first two (N = 0, 1) modes is described in detail.
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Hsue et al. (1984) studied this question.
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