Interwell excitons in GaAs superlattices

Dan Birkedal, Karim El Sayed, G. Sanders, C. Spiegelberg, Lyssenko Vadim, C. Stanton, Jørn Märcher Hvam, V. B. Timofeev, M. Bayer

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    Abstract

    The formation of spatially indirect excitons in superlattices with narrow minibands is theoretically and experimentally investigated. We identify the experimental conditions for the observation of interwell excitons and find a distinct excitonic state energetically located between the Is exciton and the onset of the miniband absorption. The interwell exciton is similar to the first Wannier-Stark localized exciton of on electrically biased superlattice. However. in the present case the localization is mediated by the Coulomb interaction of the electron and the hole without external fields.
    Original languageEnglish
    JournalPhysical Review B
    Volume54
    Issue number15
    Pages (from-to)10316-10319
    ISSN2469-9950
    DOIs
    Publication statusPublished - 1996

    Bibliographical note

    Copyright (1996) American Physical Society.

    Keywords

    • COUPLED QUANTUM-WELLS
    • OSCILLATIONS
    • GAAS/ALAS SUPERLATTICES
    • OPTICAL-SPECTRA
    • DISPERSION

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