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research article

Level repulsion of localised excitons observed in near-field photoluminescence spectra

Crottini, A.  
•
Kaitouni, R. I.  
•
Staehli, J. L.  
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2002
Physica Status Solidi a-Applied Research

GaAs/GaAlAs quantum wires grown by modulated flow rate metalorganic chemical vapour deposition were investigated by spatially resolved photoluminescence spectroscopy using a scanning near-field optical microscope. It was found that the wires decompose into a series of regions that emit luminescence of varying intensity. The spectra of these regions feature several narrow emission lines, which means that there is a series of more or less localised exciton states inside each region. It is expected that these exciton states are very close to each other and are correlated, which leads to level repulsion. The mean autocorrelation function taken from a series of near-field spectra clearly reveals this level repulsion, which amounts to roughly 2 meV.

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Type
research article
DOI
10.1002/1521-396X(200204)190:3%3C631::AID-PSSA631%3E3.0.CO;2-V
Web of Science ID

WOS:000175657000005

Author(s)
Crottini, A.  
•
Kaitouni, R. I.  
•
Staehli, J. L.  
•
Deveaud, B.  
•
Wang, X. L.
•
Ogura, M.
Date Issued

2002

Published in
Physica Status Solidi a-Applied Research
Volume

190

Issue

3

Start page

631

End page

635

Subjects

QUANTUM-WELL

•

SPECTROSCOPY

Note

Swiss Fed Inst Technol, Dept Phys, CH-1015 Lausanne, Switzerland. Electrotech Lab, Tsukuba, Ibaraki 3058568, Japan. Staehli, JL, Swiss Fed Inst Technol, Dept Phys, PH-Ecublens, CH-1015 Lausanne, Switzerland.

ISI Document Delivery No.: 553CB

Cited Reference Count: 6

Cited References:

CROTTINI A, IN PRESS ULTRAMICROS

CROTTINI A, 2001, PHYS REV B, V63

HESS HF, 1994, SCIENCE, V264, P1740

INTONTI F, 2001, PHYS REV LETT, V87

RUNGE E, 1998, PHYS STATUS SOLIDI B, V206, P167

WU Q, 1999, PHYS REV LETT, V83, P2652

Peer reviewed

REVIEWED

Written at

EPFL

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LOEQ  
Available on Infoscience
August 31, 2007
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/11476
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