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A plasmonic resonator system composed of a metal-insulator-metal waveguide coupled with a disk and a ring cavity was proposed to produce double Fano resonances, which resulted from the coupling between the narrow discrete resonances of the ring cavity and the broad spectrum of the disk resonator. Based on the proposed structure, end-coupled cavities are added to form new coupled plasmonic resonator...
A compact structure is proposed to achieve double ultrasharp Fano profiles, which comprises with a metal-insulator-metal (MIM) bus waveguide coupled with a circular cavity and groove resonator. Simulation results show that this two sharp Fano profiles both originate from the interference between the circular cavity and the groove resonator. To optimize the Fano profiles, we introduce a metallic nanodisk...
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