Infoscience

Journal article

Optical signatures of energy-level statistics in a disordered quantum system

Time-resolved measurements of the resonant Rayleigh scattering from quantum well excitons are shown to provide information on the energy-level statistics of the localized exciton states. The signal transients are reproduced by a microscopic quantum model of the exciton two-dimensional motion in presence of spatially correlated disorder. This model allows quantitative determination of the average energy separation between the localized states. Here this quantity turns out to be only a few times smaller than the average disorder amplitude, proving that spatial correlation and quantum mechanics are equally important in the description of the exciton localization process.

    Keywords: RESONANT RAYLEIGH-SCATTERING ; INTERFACE ROUGHNESS ; SECONDARY-EMISSION ; WELL STRUCTURES ; TIME EVOLUTION ; EXCITONS ; LOCALIZATION ; PHOTOLUMINESCENCE ; PARTICLES ; SPECTRA

    Note:

    Swiss Fed Inst Technol, Dept Phys, CH-1015 Lausanne, Switzerland. Savona, V, Swiss Fed Inst Technol, Dept Phys, CH-1015 Lausanne, Switzerland.

    ISI Document Delivery No.: 271HJ

    Times Cited: 28

    Cited Reference Count: 32

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    Reference

    Record created on 2007-08-31, modified on 2017-05-12

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