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A Self-Organized Molecular Beam Epitaxial Growth of the InSb/AlGaSb Quantum Dots on High-Index GaAs Substrates

Published online by Cambridge University Press:  03 September 2012

Mitsuaki Yano ,
Kazuto Koike ,
Masataka Inoue ,
Toshiya Saitoh  and
Kanji Yoh
Mitsuaki Yano
Affiliation:
New Materials Research Center, Osaka Institute of Technology, Asahi-ku Ohmiya, Osaka 535, Japan.
Kazuto Koike
Affiliation:
New Materials Research Center, Osaka Institute of Technology, Asahi-ku Ohmiya, Osaka 535, Japan.
Masataka Inoue
Affiliation:
New Materials Research Center, Osaka Institute of Technology, Asahi-ku Ohmiya, Osaka 535, Japan.
Toshiya Saitoh
Affiliation:
RCIQE Hokkaido University, Kita-ku N13W8, Sapporo 060, Japan.
Kanji Yoh
Affiliation:
RCIQE Hokkaido University, Kita-ku N13W8, Sapporo 060, Japan.
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Abstract

In-situ organization of InSb quantum dots on Al0.5Ga0.5Sb is reported. Samples were grown on just (100), 5°off (100) towards [0-1-1],(311)A, and (311)B surfaces of GaAs by molecular beam epitaxy. The growth mechanism and characteristics of quantum dots were analyzed using reflection high-energy electron diffraction, atomic force microscopy, and photoluminescence. Observed photoluminescence peak shift towards lower energy side with InSb thickness was interpreted by the development of quantum dots. Substrate orientation effect was examined and found to be useful to increase the dot density. As a result, as high as ~3xl 09 cm-2 dot density was achieved on the (311 )B substrate whereas the typical value on the (100) was ~2xl 08 cm-2 .

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 448: Symposium M – Control of Semiconductor Surfaces and Interfaces , 1996 , 193
Copyright
Copyright © Materials Research Society 1997

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