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WG resonances of the corrugated wires. (A) Analytically calculated normalized scattering widths (red line) for d2/d1 = 1 and r2/r1 = 0.01. The dashed gray line represents the scattering width for an infinite conducting cylinder, where r2/r1 = 1. (B) Analytically calculated amplitudes of the total electric fields under the incidence of a unit-amplitude plane wave at resonance frequencies ω1, ω2, and ω3, respectively. We can see obvious various WG modes.
