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.
Intonti
F
F
Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Strasse 2A, D-12489 Berlin, Germany.
Emiliani
V
V
Lienau
C
C
Elsaesser
T
T
Savona
V
V
Runge
E
E
Zimmermann
R
R
Nötzel
R
R
Ploog
K H
KH