Comprehensive studies dealing with plasmonic resonators formed in
metal-insulator-metal (MIM) plasmonic waveguides are discussed. A
brief review of the fundamental guiding properties of a MIM plasmonic
waveguide is provided. Working principles and design processes of various
plasmonic resonators in MIM waveguides are then discussed, including
the plasmonic resonators based on the waveguide Bragg grating
(WBG), those originating from the Fabry-Perot resonance in the lowrefractive-
index barriers, resonators with a stub geometry, and those
comprised of ring resonators.
