Abstract

The characteristics of resonant modes in the side-coupled asymmetric square-ring resonator based on a plasmonic waveguide are investigated. The 1-order modes and 2-order modes can be manipulated by adjusting the longitudinal distance Δz and transversal distance Δx of the metal block in the square air cavity. The coupling and splitting effect of the resonant modes in the asymmetric square ring resonator are exploring. The proposed structure is potential in sensing and filtering.

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