Fully ion-implanted InP/InGaAs heterojunction FET fabrication in photodiode layer structure for monolithic integration
A fully ion-implanted InP/lnGaAs HJFET has been fabricated in a layer structure optimised for a pin photodiode. Ion implantation has been used to form the channel, to improve the source and drain contact resistances, and to define the 1.5 μm long gate. The HJFETs show a minimum output conductance of 14 mS/mm and a maximum transconductance of 140 mS/mm.