Effects of growth interruption on the evolution of InAs/InP self-assembled quantum dots

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We investigated the change in the structural and optical properties of InAs/lnP quantum structures during growth interruption (GI) for various times and under various atmospheres in metalorganic chemical vapor deposition. Under AsH3 + H-2 atmosphere, the mass transport for the 2D-to-3D transition was observed during the GI. Photoluminescence peaks from both quantum dots (QDs) and quantum wells were observed from the premature QD samples. The fully developed QDs showed the two distinct temperature regimes in the PL peak position, full width at half maximum (FWHM) and wavelength-integrated peak intensity. The two characteristic activation energies were obtained from the InAs/InP QDs: similar to 10 meV for intra-dot excitation and 90 similar to 110 meV for the excitation out of the dots, respectively. It was also observed that the QD evolution kinetics could be suppressed in PH3 + H-2 and H-2 atmospheres. The proper control of GI time and atmosphere might be a useful tool to further improve the properties of QDs.
Publisher
MINERALS METALS MATERIALS SOC
Issue Date
2000-05
Language
English
Article Type
Article
Keywords

VAPOR-PHASE EPITAXY; OPTICAL-PROPERTIES; TEMPERATURE-DEPENDENCE; LINE-SHAPE; ISLANDS; GAAS; PHOTOLUMINESCENCE; ORGANIZATION; THICKNESS; MBE

Citation

JOURNAL OF ELECTRONIC MATERIALS, v.29, no.5, pp.535 - 541

ISSN
0361-5235
URI
http://hdl.handle.net/10203/77892
Appears in Collection
MS-Journal Papers(저널논문)
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