Abstract
In this paper, we designed and simulated an ultra-compact plasmonic filter consisting of a graphene ribbon laterally coupled to a graphene split disk resonator. Introducing a split inside the disk leads to split of the resonance modes symmetrically and asymmetrically. The spacing between the symmetric and asymmetric modes can be controlled through changing length of the split in the disk and the simulation results reveal that all modes identically shift as a result of changing the Fermi level of the disk. finite-difference time-domain method is used to investigate the device performance.
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