Single-dot Spectroscopy of GaAs Quantum Dots Fabricated by Filling of Self-assembled Nanoholes

We study the optical emission of single GaAs quantum dots (QDs). The QDs are fabricated by filling of nanoholes in AlGaAs and AlAs which are generated in a self-assembled fashion by local droplet etching with Al droplets. Using suitable process parameters, we create either uniform QDs in partially f...

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Detalles Bibliográficos
Autores principales: Heyn, Ch, Klingbeil, M, Strelow, Ch, Stemmann, A, Mendach, S, Hansen, W
Formato: Texto
Lenguaje:English
Publicado: Springer 2010
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2956035/
https://www.ncbi.nlm.nih.gov/pubmed/21076707
http://dx.doi.org/10.1007/s11671-010-9687-x
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author Heyn, Ch
Klingbeil, M
Strelow, Ch
Stemmann, A
Mendach, S
Hansen, W
author_facet Heyn, Ch
Klingbeil, M
Strelow, Ch
Stemmann, A
Mendach, S
Hansen, W
author_sort Heyn, Ch
collection PubMed
description We study the optical emission of single GaAs quantum dots (QDs). The QDs are fabricated by filling of nanoholes in AlGaAs and AlAs which are generated in a self-assembled fashion by local droplet etching with Al droplets. Using suitable process parameters, we create either uniform QDs in partially filled deep holes or QDs with very broad size distribution in completely filled shallow holes. Micro photoluminescence measurements of single QDs of both types establish sharp excitonic peaks. We measure a fine-structure splitting in the range of 22–40μeV and no dependence on QD size. Furthermore, we find a decrease in exciton–biexciton splitting with increasing QD size.
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spelling pubmed-29560352010-11-10 Single-dot Spectroscopy of GaAs Quantum Dots Fabricated by Filling of Self-assembled Nanoholes Heyn, Ch Klingbeil, M Strelow, Ch Stemmann, A Mendach, S Hansen, W Nanoscale Res Lett Nano Express We study the optical emission of single GaAs quantum dots (QDs). The QDs are fabricated by filling of nanoholes in AlGaAs and AlAs which are generated in a self-assembled fashion by local droplet etching with Al droplets. Using suitable process parameters, we create either uniform QDs in partially filled deep holes or QDs with very broad size distribution in completely filled shallow holes. Micro photoluminescence measurements of single QDs of both types establish sharp excitonic peaks. We measure a fine-structure splitting in the range of 22–40μeV and no dependence on QD size. Furthermore, we find a decrease in exciton–biexciton splitting with increasing QD size. Springer 2010-07-14 /pmc/articles/PMC2956035/ /pubmed/21076707 http://dx.doi.org/10.1007/s11671-010-9687-x Text en Copyright © 2010 The Author(s) https://creativecommons.org/licenses/by-nc/4.0/ This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
spellingShingle Nano Express
Heyn, Ch
Klingbeil, M
Strelow, Ch
Stemmann, A
Mendach, S
Hansen, W
Single-dot Spectroscopy of GaAs Quantum Dots Fabricated by Filling of Self-assembled Nanoholes
title Single-dot Spectroscopy of GaAs Quantum Dots Fabricated by Filling of Self-assembled Nanoholes
title_full Single-dot Spectroscopy of GaAs Quantum Dots Fabricated by Filling of Self-assembled Nanoholes
title_fullStr Single-dot Spectroscopy of GaAs Quantum Dots Fabricated by Filling of Self-assembled Nanoholes
title_full_unstemmed Single-dot Spectroscopy of GaAs Quantum Dots Fabricated by Filling of Self-assembled Nanoholes
title_short Single-dot Spectroscopy of GaAs Quantum Dots Fabricated by Filling of Self-assembled Nanoholes
title_sort single-dot spectroscopy of gaas quantum dots fabricated by filling of self-assembled nanoholes
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2956035/
https://www.ncbi.nlm.nih.gov/pubmed/21076707
http://dx.doi.org/10.1007/s11671-010-9687-x
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AT stemmanna singledotspectroscopyofgaasquantumdotsfabricatedbyfillingofselfassemblednanoholes
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