Physical Properties of Wave Scattering by Chiral Periodic Structure

X. Yang and T.X. Wu (USA)


periodic structure, chiral media, mode-matching method,leaky wave


Physical properties of wave scattering through chiral periodic structure are studied in this paper. At low frequencies, the scattering of plane waves by the chiral periodic structure acts approximately as the scattering of plane waves by a uniform chiral slab with parameters equal to the average of those for the periodic layer. At higher frequencies, we find anomalous coupling regions known as Wood's anomalies and are explained by the excitation and reradiation of leaky waveguide modes in the periodic layer. This device can possess both frequency selection and mode conversion properties.

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