Silicon-graphene hybrid plasmonic waveguide photodetectors beyond 1.55 μm

Waveguide photodetectors beyond 1.55 μm are becoming very attractive for many applications. Recently, researchers from Zhejiang University and Southeast University in China proposed and realized high-performance silicon-graphene hybrid plasmonic waveguide photodetectors beyond 1.55 μm (e.g., 2 μm), by introducing an ultra-thin wide silicon-graphene hybrid plasmonic waveguide with efficient light absorption in graphene. This work paves the way for achieving high-responsivity and high-speed near/mid-infrared waveguide photodetectors on silicon.