InP-Based Membrane Couplers for Optical Interconnects on Si

We present the design, fabrication, and characterization of a membrane coupler processed on an indium phosphide membrane layer on a silicon-on-insulator wafer, that is used for applications in optical interconnects on silicon. Measured coupler efficiency is 50%. The photonic device fabrication is compatible with wafer scale processing steps, guaranteeing compatibility towards future generation electronic integrated circuit processing.