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    Spatio-temporal dynamics of quantum-well excitons

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    Issue Date
    2003-01
    Author
    Zhao, Hui
    Dal Don, B.
    Moehl, Sebastian
    Kalt, Heinz
    Ohkawa, K.
    Hommel, D.
    Publisher
    American Physical Society
    Type
    Other
    Version
    http://arxiv.org/abs/cond-mat/0207326v2
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    Abstract
    We investigate the lateral transport of excitons in ZnSe quantum wells by using time-resolved micro-photoluminescence enhanced by the introduction of a solid immersion lens. The spatial and temporal resolutions are 200 nm and 5 ps, respectively. Strong deviation from classical diffusion is observed up to 400 ps. This feature is attributed to the hot-exciton effects, consistent with previous experiments under cw excitation. The coupled transport-relaxation process of hot excitons is modelled by Monte Carlo simulation. We prove that two basic assumptions typically accepted in photoluminescence investigations on excitonic transport, namely (i) the classical diffusion model as well as (ii) the equivalence between the temporal and spatial evolution of the exciton population and of the measured photoluminescence, are not valid for low-temperature experiments.
    Description
    Permissions were not obtained for sharing the full text of this article. Full text available from the American Physical Society and from arXiv. See links in this record.
    URI
    http://hdl.handle.net/1808/7357
    DOI
    https://doi.org/10.1103/PhysRevB.67.035306
    Collections
    • Physics & Astronomy Scholarly Works [1713]
    Citation
    Hui Zhao, B. Dal Don, S. Moehl, H. Kalt, K. Ohkawa and D. Hommel, Spatio-temporal dynamics of quantum-well excitons, Physical Review B, 67 035306 (2003). http://link.aps.org/doi/10.1103/PhysRevB.67.035306

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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