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Investigation of Nitrogen Induced closely coupled Sb based Quantum Dots for Infrared Sensors Application

Published online by Cambridge University Press:  01 February 2011

Seongsin M Kim ,
Fariba Hatami ,
Homan B Yuen  and
James S Harris
Seongsin M Kim
Affiliation:
[email protected], Stanford University, EE, 420 Via palou, CISX 310, stanford, CA, 94305, United States
Fariba Hatami
Affiliation:
[email protected], Stanford University, Stanford, CA, 94305, United States
Homan B Yuen
Affiliation:
[email protected], Stanford University, Stanford, CA, 94305, United States
James S Harris
Affiliation:
[email protected], Stanford University, Stanford, CA, 94305, United States
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Abstract

We report the growth and structural properties of InSb and InSb:N quantum dots on InAs and GaAs substrates. Strain induced, self-assembled quantum dots are grown using solid-source molecular beam epitaxy. For improved growth control, we developed a growth technique similar to atomic layer epitaxial methods. InSb and InSb:N multiple quantum dots formed on both InAs and GaAs. We explain the formation of multiple quantum dots by the anisotropic distribution of strain energy within the quantum dot, the long adatom lifetime during atomic layer epitaxy, and the low bond energy of InSb. Nitrogen incorporation during formation of quantum dots changes surface energy barrier and causes anisotropic distribution of strain energy, results in formation of closely coupled multiple quantum dots in <110> orientation. We obtained mid infrared luminescence around 3.6 μm from InNSb QDs grown on InAs substrate, where it exhibits relatively low efficiencies of nitrogen incorporation compared to the quantum well structure.

Keywords

self-assemblyepitaxynanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 959: Symposium M – Quantum Dots—Growth, Behavior and Applications , 2006 , 0959-M16-07
Copyright
Copyright © Materials Research Society 2007

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References

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