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

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

<p>Abstract</p> <p>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 cre...

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Main Authors: Heyn Ch, Klingbeil M, Strelow Ch, Stemmann A, Mendach S, Hansen W
Format: Article
Language:English
Published: SpringerOpen 2010-01-01
Series:Nanoscale Research Letters
Online Access:http://dx.doi.org/10.1007/s11671-010-9687-x
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spelling doaj-404c09a1eb4040caaec1c6d07765a98e2020-11-24T23:43:31ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2010-01-0151016331636Single-dot Spectroscopy of GaAs Quantum Dots Fabricated by Filling of Self-assembled NanoholesHeyn ChKlingbeil MStrelow ChStemmann AMendach SHansen W<p>Abstract</p> <p>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&#8211;40&#956;eV and no dependence on QD size. Furthermore, we find a decrease in exciton&#8211;biexciton splitting with increasing QD size.</p> http://dx.doi.org/10.1007/s11671-010-9687-x
collection DOAJ
language English
format Article
sources DOAJ
author Heyn Ch
Klingbeil M
Strelow Ch
Stemmann A
Mendach S
Hansen W
spellingShingle 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
Nanoscale Research Letters
author_facet Heyn Ch
Klingbeil M
Strelow Ch
Stemmann A
Mendach S
Hansen W
author_sort Heyn Ch
title 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_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_sort single-dot spectroscopy of gaas quantum dots fabricated by filling of self-assembled nanoholes
publisher SpringerOpen
series Nanoscale Research Letters
issn 1931-7573
1556-276X
publishDate 2010-01-01
description <p>Abstract</p> <p>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&#8211;40&#956;eV and no dependence on QD size. Furthermore, we find a decrease in exciton&#8211;biexciton splitting with increasing QD size.</p>
url http://dx.doi.org/10.1007/s11671-010-9687-x
work_keys_str_mv AT heynch singledotspectroscopyofgaasquantumdotsfabricatedbyfillingofselfassemblednanoholes
AT klingbeilm singledotspectroscopyofgaasquantumdotsfabricatedbyfillingofselfassemblednanoholes
AT strelowch singledotspectroscopyofgaasquantumdotsfabricatedbyfillingofselfassemblednanoholes
AT stemmanna singledotspectroscopyofgaasquantumdotsfabricatedbyfillingofselfassemblednanoholes
AT mendachs singledotspectroscopyofgaasquantumdotsfabricatedbyfillingofselfassemblednanoholes
AT hansenw singledotspectroscopyofgaasquantumdotsfabricatedbyfillingofselfassemblednanoholes
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