MBE regrowth on planar and patterned In(GaAs)P layers for monolithic integration

MBE regrowth of InP based device layers on planar and patterned In(GaAs)P structures was studied in the framework of monolithic integration of an optoelectronic receiver comprising HEMTs and a waveguide integrated photodiode. Appropriate surface cleaning prior to regrowth proved to be essential for obtaining low contamination levels and surfaces of high morphological quality. Different wet chemical etchants and surface oxidation using UV/ozone exposure have been compared. In this context MBE regrowth over etched steps was also addressed.