AlGaAs/GaAs/AlGaAs quantum wells as a sensitive tool for the MOVPE reactor environment

Details AlGaAs/GaAs/AlGaAs quantum wells as a sensitive tool for the MOVPE reactor environment AlGaAs/GaAs/AlGaAs quantum wells as a sensitive tool for the MOVPE reactor environment

2011-08-16

arxiv.org/abs/1108.3294v1

Physics

Condensed Matter

Materials Science

Scientific paper

We present in this work a simple Quantum Well (QW) structure consisting of GaAs wells with AlGaAs barriers as a probe for measuring the performance of arsine purifiers within a MetalOrganic Vapour Phase Epitaxy system. Comparisons between two different commercially available purifiers are based on the analysis of low temperature photoluminescence emission spectra from thick QWs, grown on GaAs substrates misoriented slightly from (100). Neutral excitons emitted from these structures show extremely narrow linewidths, comparable to those which can be obtained by Molecular Beam Epitaxy in an ultra-high vacuum environment, suggesting that purifications well below the 1ppb level are needed to achieve high quality quantum well growth.

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