Experimental investigation and modeling of the fine structure splitting of neutral excitons in strain-free GaAs/AlxGa1-xAs quantum dots

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F10%3A00043625" target="_blank" >RIV/00216224:14310/10:00043625 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Experimental investigation and modeling of the fine structure splitting of neutral excitons in strain-free GaAs/AlxGa1-xAs quantum dots

Original language description

We measure, by photoluminescence spectroscopy, the fine structure splitting (FSS) of bright excitons confined in a large number of elongated and unstrained Al0.35Ga0.65As/GaAs/Al0.45Ga0.55As quantum dots (QDs) and quantum-well potential fluctuations (QWPFs). While the FSS values are comparable, the light polarization directions for well-oriented QDs and randomly oriented QWPFs on the same sample are substantially different. We compare the results with model calculations using as input scanning probe microscopy data of QD structures nominally identical to those investigated by photoluminescence. The model reproduces well the polarization orientation for all studied samples and also the magnitude of the FSS, at least for relatively tall dots. We discussthe results and elucidate the role of in-plane elongation on the FSS.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

<a href="/en/project/GA202%2F06%2F0718" target="_blank" >GA202/06/0718: Quantum dot engineering</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2010

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physical Review B

ISSN

1098-0121

e-ISSN

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Volume of the periodical

81

Issue of the periodical within the volume

12

Country of publishing house

US - UNITED STATES

Number of pages

4

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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