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Controlling Lateral Ordering of InGaAs Quantum Dots with Arsenic Background

Published online by Cambridge University Press:  01 February 2011

Euclydes Marega ,
Ziad Abu Waar ,
Mohammad Hussein  and
Gregory Salamo
Euclydes Marega
Affiliation:
euclydes@uark.edu, University of Arkansas, Physics, 226 Physics Building, Fayetteville, AR, 72701, United States, 479-575-4217
Ziad Abu Waar
Affiliation:
zabuwaa@uark.edu, University of Arkansas, Physics, 226 Physics Building, Fayetteville, AR, 72701, United States
Mohammad Hussein
Affiliation:
mhussei@uark.edu, University of Arkansas, Physics, 226 Physics Building, Fayetteville, AR, 72701, United States
Gregory Salamo
Affiliation:
salamo@uark.edu, University of Arkansas, Physics, 226 Physics Building, Fayetteville, AR, 72701, United States
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Abstract

We present in this work a method to control lateral ordering of In0.4Ga0.6As quantum dots (QDs) using the surface anisotropic and the growth environment. We have shown experimentally that using As2 molecules instead of As4 as a background flux is promising to control the diffusion of adatoms in away to make it possible to control the ordering of In0.4Ga0.6As QDs together with the GaAs surface properties specially for GaAs (100) surfaces. For GaAs (n11)B surfaces the As4 provides a better two dimension ordering than the As2 environment. Our results are consistent with reported experimental and theoretical studies on surface structure and diffusion mechanism over GaAs surface.

Keywords

semiconductingself-assemblynanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 959: Symposium M – Quantum Dots—Growth, Behavior and Applications , 2006 , 0959-M17-16
Copyright
Copyright © Materials Research Society 2007

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References

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