Plasmonic switch based on asymmetric cavities with embedding square of gold inside the cavities

We proposed an all-optical plasmonic switch based on metal-insulator-metal structures. used the intrinsic nonlinear properties of gold to implement switch. The consists a bus waveguide side coupled with pair asymmetric vertical cavities. obtained transmission spectrum structure for low input intensities. results showed that sharp dip occurs at wavelength 860 nm. Due and Kerr effects, has high ratio about 0.8 mW / μm2 threshold power 0.07 μm2. without using nanostructure shows reduction 50%. result potential be applied in integration circuits.