Zhuang, Qiandong and Yoon, S. F. and Zheng, H. Q. (2001) Growth and emission tuning of InAs/InP quantum dots superlattice. Journal of Crystal Growth, 227-22. pp. 1084-1088. ISSN 0022-0248Full text not available from this repository.
We report the solid source molecular beam epitaxial growth of InAs/InP quantum dot (QD) superlattices and the effect of As/P exchange on the interface between InAs and InP. The InAs QDs were found to have an average lateral diameter of ∼40 nm and a density of 3–4×109 cm−2. The QDs superlattice has photoluminescence (PL) emission centred at 0.77 eV with a linewidth of 64 meV at low temperature (4 K). X-ray diffraction (XRD) spectra showed evidence of significant As/P exchange on the interface between InAs and InP during in situ annealing under P2 pressure before growing the spacer layer of InP. An average P composition of ∼30% in the resulting InAsP QDs in samples annealed for 50 s was deduced from dynamical simulations of the experimental XRD spectra. The QDs superlattice PL emission exhibits a blueshift following an increase in annealing time, and emission at 1.55 μm and at 300 K was achieved. This observation holds promise for possible telecommunication device applications at long wavelengths.
|Journal or Publication Title:||Journal of Crystal Growth|
|Uncontrolled Keywords:||Quantum dots; Superlattice; As/P exchange; PL emission|
|Subjects:||Q Science > QC Physics|
|Departments:||Faculty of Science and Technology > Physics|
|Deposited On:||16 Nov 2011 14:22|
|Last Modified:||24 Jan 2014 05:23|
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