Generation of Surface Plasmon Polariton Using Plasmonic Resonant Cavity Based on Microdisk Laser

We study the generation of surface plasmon polariton and its extraction efficiency from a microdisk-based plasmonic source to a metal-insulator-metal (MIM) waveguide. The field distribution is no longer a whispering gallery mode commonly found in microdisk lasers but hybridized with surface plasmon polariton. We observe the steady-state intensity of the surface plasmon polariton mode inside the plasmonic microdisk structure at 1.47-mu m wavelength. This field intensity is extracted efficiently to a MIM plasmonic waveguide through a nanometer gap. The extraction efficiency reaches 60%.