title: Quantum mechanical repulsion of exciton levels in a disordered quantum well.
abstract: 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.
authors.affiliation: Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Strasse 2A, D-12489 Berlin, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Intonti
authors.forename: V
authors.initials: V
authors.lastname: Emiliani
authors.forename: C
authors.initials: C
authors.lastname: Lienau
authors.forename: T
authors.initials: T
authors.lastname: Elsaesser
authors.forename: V
authors.initials: V
authors.lastname: Savona
authors.forename: E
authors.initials: E
authors.lastname: Runge
authors.forename: R
authors.initials: R
authors.lastname: Zimmermann
authors.forename: R
authors.initials: R
authors.lastname: Nötzel
authors.forename: K H
authors.initials: KH
authors.lastname: Ploog