Fabrication technique for low-loss plasmonic waveguides incorporating both "plasmonic-friendly" and "plasmonic-unfriendly" metals

Fabrication technology, which allows a substantial decrease of the plasmonic propagation loss for both "plasmon- friendly" metals like Au, Cu or Al and "plasmon- unfriendly" metals like Co, Fe or Cr, has been developed and experimentally demonstrated. Optimization of the optical confinement is used to reduce the propagation loss below 1 dB per plasmonic device.