GaInAs PIN photodiodes grown on silicon substrates for 1.55 μm detection

Abstract
We report the first GalnAs PIN photodiodes to be fabricated on silicon substrates. Superlattice buffer layers were used to accommodate the lattice parameter mismatch. Reverse leakage currents of ̃70nA at – 1 V bias were measured for 105μm-diameter mesa diodes. The uncoated external quantum efficiency at a wavelength of 1.55μmwas 30%.