propose and analyze a submicron stub-assisted ultrafast all-optical plasmonic
switch based on nonlinear MIM waveguide. It is constructed by two silicon stub filters sandwiched by silver
cladding. The signal wavelength is assumed to be 1550 nm. The simulation results show a ?14.66 dB extinction ratio. Downscaling the silicon waveguide in MIM structure
leads to enhancement of the effective Kerr nonlinearity due to tight mode
confinement. Also, using O+ ions implanted into silicon, the
switching time less than 10 ps and a
delay time less than 8 fs are achieved. The overall length of the switch is 550 nm.