CATION INTERDIFFUSION IN INGAASP/INGAASP MULTIPLE-QUANTUM WELLS WITH CONSTANT P/AS RATIO

On quaternary/quaternary multiple quantum wells, with constant P/As ratio and In-rich wells, we show the possibility of producing a blueshift of the heavy hole exciton line with interdiffusing only group III atoms, similarly to GaAs/GaAlAs and InGaAs/GaAs systems. This kind of structure, particularly suitable for group III diffusion study, has allowed us to obtain a quantitative value of the In-Ga interdiffusion coefficient at 850°C: DIn-Ga≈4.72×10-16 cm2 s-1.© 1995 American Institute of Physics.