Plasmonic device enabling simplified fabrication

A plasmonic device, comprising:

• a substrate, and
• a dielectric layer arranged between a base metal layer and a structured metal layer which form with respect to the substrate a vertical stack of layers,
• wherein the structured metal layer includes arranged in a horizontal direction an input structure for enabling an input section, a waveguide structure for enabling a horizontal plasmonic waveguide, and an output structure for enabling an output section,
• wherein the input section is configured to vertically receive an optical input signal and transmit in the horizontal direction input power to the horizontal plasmonic waveguide,
• wherein the horizontal plasmonic waveguide is configured to receive input power from the input section and transmit output power to the output section, and
• wherein the output section is configured to receive output power in the horizontal direction from the horizontal plasmonic waveguide and vertically transmit an optical output signal, and
• wherein the waveguide structure of the structured metal layer includes a plurality of laterally and electrically separated individual waveguide structures providing the horizontal plasmonic waveguide in the form of a plurality of individual plasmonic waveguides.