GaAs metal-semiconductor field effect transistor with InGaP/GaAs multiquantum barrier buffer layer

A novel metal-semiconductor field effect transistor (MESFET) with InGaP/GaAs multiple quantum barrier (MQB) buffer layer was studied. Since the effective potential barrier height is enhanced using the InGaP/GaAs MQB structure, good performances of electronic and optical isolations are achieved. A configuration with the MESFET and sidegate electrode was fabricated to demonstrate the function of the InGaP/GaAs MQB structure.