Volume dependence of excitonic fine structure splitting in geometrically similar quantum dots
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F14%3APU109876" target="_blank" >RIV/00216305:26620/14:PU109876 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Volume dependence of excitonic fine structure splitting in geometrically similar quantum dots
Original language description
We investigate the fine structure splitting (FSS) of excitons confined in strain-free, highly symmetric GaAs/AlGaAs quantum dots (QDs) as a function of size. QDs with similar geometry are created by filling nanoholes on an AlGaAs surface with different amounts of GaAs. In turn, nanoholes of regular reversed-cone shape are obtained by Al-droplet etching of an AlGaAs layer. The resulting QDs have high optical quality, as witnessed by emission linewidths smaller than 20 ueV under nonresonant excitation. The average FSS decreases from 12.5 +- 6.4 to 3.6 +- 1.7 ueV as the QD height increases from 5.4 +- 0.3 to 8.0 +- 0.2 nm, following the expected 1/volume dependence. Theoretical calculations using atomic force microscopy data of QD structures as input showthat the geometrical similarity of QDs is reflected in invariant aspect ratio and lateral elongation of the wave functions and reproduce the experimental FSS energies.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
<a href="/en/project/EE2.3.30.0005" target="_blank" >EE2.3.30.0005: Support of Interdisciplinary Excellence Research Teams Establishment at BUT</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
PHYSICAL REVIEW B
ISSN
1098-0121
e-ISSN
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Volume of the periodical
90
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
5
Pages from-to
"041304-1"-"041304-5"
UT code for WoS article
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EID of the result in the Scopus database
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