we have proposed and investigated micro-ring add-drop switch and m-z interferometric element for on-chip router applications based on silicon hybrid plasmonic waveguide. the proposed silicon hybrid plasmonic waveguide possesses lower propagation loss compared with conventional plasmonic metal-insulator-metal waveguide. by employing this low loss waveguide, it is found that the proposed ring add-drop switch possesses high transmission efficiency (-1 db), and the extinction ratio can be as high as 30 db at 1.556 mu m. in addition, the transmission efficiency of drop port for the m-z interferometric element can be -1.15 db at 1.55 mu m. the designed elements are essential for the on-chip router in optical interconnect.