Ohmic contact control in modulation-doped gallium arsenide field-effect transistors

Abstract
Modulation‐doped field‐effect transistor structures grown by molecular beam epitaxy were excimer laser annealed at a wavelength of 248 nm and energy density of 75–160 mJ/cm2. A transconductance of over 100 mS/mm was obtained. Source resistance was minimized at 0.8–1.0 Ω mm. The energy density threshold for interdiffusion is 90 mJ/cm2.