We studied multimode interference effect in a metamaterial constructed by silver nanorod pair arrays. Dipole electric resonance (ER), quadrupole magnetic resonance (MR), and Rayleigh anomaly (RA) are supported in this structure. Interference effect between either two modes is analyzed. The magnetic coupling between MR and RA, the reversed plasmon hybridization effect, and the destructive interference between ER and RA can all be brought together to realize multimode interference. Fano resonance resulted from this multimode interference is sharp, nearly symmetric, and dynamically tunable. It can be tuned linearly from ON to OFF simply through varying incident angle. The multimode interference method can cover the shortage of traditional dualmode interference and offer a better control of plasmonic metamaterials'spectral response.

Destructive interference; Fano resonances; Interference effects; Multi-mode interference; Multimode interference effects; Optical metamaterials; Plasmon hybridization; Plasmonic metamaterials

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