Raman scattering of InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces

We present a comparative analysis of Raman scattering by acoustic and optical phonons in InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces. Doublets of folded longitudinal acoustic phonons up to the fifth order were observed in the Raman spectra of (001)- and (311)B-oriente...

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Autores principales: Milekhin, Alexander, Yeryukov, Nikolay, Toropov, Alexander, Dmitriev, Dmitry, Sheremet, Evgeniya, Zahn, Dietrich RT
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2012
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3506502/
https://www.ncbi.nlm.nih.gov/pubmed/22916827
http://dx.doi.org/10.1186/1556-276X-7-476
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author Milekhin, Alexander
Yeryukov, Nikolay
Toropov, Alexander
Dmitriev, Dmitry
Sheremet, Evgeniya
Zahn, Dietrich RT
author_facet Milekhin, Alexander
Yeryukov, Nikolay
Toropov, Alexander
Dmitriev, Dmitry
Sheremet, Evgeniya
Zahn, Dietrich RT
author_sort Milekhin, Alexander
collection PubMed
description We present a comparative analysis of Raman scattering by acoustic and optical phonons in InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces. Doublets of folded longitudinal acoustic phonons up to the fifth order were observed in the Raman spectra of (001)- and (311)B-oriented quantum dot superlattices measured in polarized scattering geometries. The energy positions of the folded acoustic phonons are well described by the elastic continuum model. Besides the acoustic phonons, the spectra display features related to confined transverse and longitudinal optical as well as interface phonons in quantum dots and spacer layers. Their frequency positions are discussed in terms of phonon confinement, elastic stress, and atomic intermixing.
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spelling pubmed-35065022012-11-29 Raman scattering of InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces Milekhin, Alexander Yeryukov, Nikolay Toropov, Alexander Dmitriev, Dmitry Sheremet, Evgeniya Zahn, Dietrich RT Nanoscale Res Lett Nano Express We present a comparative analysis of Raman scattering by acoustic and optical phonons in InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces. Doublets of folded longitudinal acoustic phonons up to the fifth order were observed in the Raman spectra of (001)- and (311)B-oriented quantum dot superlattices measured in polarized scattering geometries. The energy positions of the folded acoustic phonons are well described by the elastic continuum model. Besides the acoustic phonons, the spectra display features related to confined transverse and longitudinal optical as well as interface phonons in quantum dots and spacer layers. Their frequency positions are discussed in terms of phonon confinement, elastic stress, and atomic intermixing. Springer 2012-08-23 /pmc/articles/PMC3506502/ /pubmed/22916827 http://dx.doi.org/10.1186/1556-276X-7-476 Text en Copyright ©2012 Milekhin et al.; licensee Springer. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Nano Express
Milekhin, Alexander
Yeryukov, Nikolay
Toropov, Alexander
Dmitriev, Dmitry
Sheremet, Evgeniya
Zahn, Dietrich RT
Raman scattering of InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces
title Raman scattering of InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces
title_full Raman scattering of InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces
title_fullStr Raman scattering of InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces
title_full_unstemmed Raman scattering of InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces
title_short Raman scattering of InAs/AlAs quantum dot superlattices grown on (001) and (311)B GaAs surfaces
title_sort raman scattering of inas/alas quantum dot superlattices grown on (001) and (311)b gaas surfaces
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3506502/
https://www.ncbi.nlm.nih.gov/pubmed/22916827
http://dx.doi.org/10.1186/1556-276X-7-476
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