
doi: 10.1063/1.111719
A linearly graded InxGa1−xP (x=0.48–1) buffer layer is used for growing a high-quality InP layer on a GaAs substrate. We show that an InxGa1−xP buffer layer is superior to an InyGa1−yAs buffer layer because it is transparent to long wavelengths and allows a less stringent composition control. InGaAs/InP single quantum wells and InAsP/InP multiple quantum wells grown on the InP/InxGa1−xP/GaAs substrate show comparable quality to similar structures grown on InP (100) substrates. Photocurrent spectra for the latter exhibit quantum-confined Stark effect near 1.3 μm.
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