RT - Journal Article T1 - Transmittance of MIM Waveguides Containing Semi-Circular Ring Shaped and Rectangular Ring Shaped Grooves JF - ijop YR - 2018 JO - ijop VO - 12 IS - 1 UR - http://ijop.ir/article-1-292-en.html SP - 3 EP - 12 K1 - MIM waveguide K1 - Plasmonic filter K1 - Plasmonic waveguide K1 - Surface plasmon AB - In this paper the transmittance of metal-insulator-metal (MIM) waveguides containing semi-circular ring shaped and rectangular ring shaped grooves are investigated. By varying groove parameters their effects on the transmittance of the MIM waveguides are investigated. The results show that the transmittance spectra of the waveguides have maximum and minimum points, and by using appropriate parameters for the grooves it is possible to make the transmittance maximum or minimum at a required frequency. Therefore by using the ring shaped grooves in the MIM waveguides a frequency splitter is designed. In comparison the efficiency of a MIM waveguide containing the ring shaped groove, on blocking the transmission of a required frequency, is higher than the efficiency of a MIM waveguide containing tooth shaped groove. LA eng UL http://ijop.ir/article-1-292-en.html M3 10.29252/ijop.12.1.3 ER -