▎ 摘　　要

NOVELTY - The source has a light source that is in optical communication with a graphene based silicon nitride waveguide. A gate electrode is in conductive communication with the waveguide. The light source is arranged to emit a pump and signal emission in opposite directions into the graphene based silicon nitride waveguide such that terahertz graphene plasmons are excited within the waveguide through enhanced difference frequency generation and emitted from the graphene based silicon nitride waveguide. USE - Plasmon source. ADVANTAGE - The source achieves graphene plasmons in chip-scale integrated photonics and optoelectronics to integrate all fields into planar waveguides so as to avoid open optical paths. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for forming a plasmon waveguide. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a plasmon apparatus.