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Physical Review B
The dispersion properties of surface modes supported by metal/dielectric interfaces perforated by twodimensional arrays of subwavelength apertures are studied. An analytical surface-impedance model is derived. It provides closed-form expressions for the dispersion relation of surface modes and allows to take into account the aperture geometry and the dispersive and dissipative properties of the metal. The model predicts the dispersion relation and the mode lifetime, in quantitative agreementdoi:10.1103/physrevb.79.165405 fatcat:2wddnek7kjgp7b3phbvc3tdtee