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research article
Quantum mechanical repulsion of exciton levels in a disordered quantum well
Spatially resolved photoluminescence spectra of a single quantum well are recorded by near-field spectroscopy. A set of over four hundred spectra displaying sharp emission lines from localized excitons is subject to a statistical analysis of the two-energy autocorrelation function. An accurate comparison with a quantum theory of the exciton center-of-mass motion in a two-dimensional spatially correlated disordered potential reveals clear signatures of quantum mechanical energy level repulsion, giving the spatial and energetic correlations of excitons in disordered quantum systems.
Type
research article
Web of Science ID
WOS:000170478300033
Authors
Emiliani, V.
•
Lienau, C.
•
Elsaesser, T.
•
•
Runge, E.
•
Zimmermann, R.
•
Notzel, R.
•
Ploog, K.H.
•
Intonti, F.
Publication date
2001
Published in
Volume
87
Article Number
076801
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
September 22, 2009
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