Strong biexcitonic effects and exciton-exciton correlations in ZnO

K. Hazu, Takayuki Sota, K. Suzuki, S. Adachi, S. F. Chichibu, G. Cantwell, B. Eason, C. Reynolds, W. Litton

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    Abstract

    We have studied experimentally biexcitonic states of ZnO of rather high quality in the low exciton density limit by means of time-integrated and spectrally-resolved four-wave mixing (FWM). FWM emission signals due to biexcitons consisting of two A-hole excitons (AA biexcitons), an A-hole and a B-hole exciton (AB biexcitons), and two B-hole excitons (BB biexcitons) have been clearly observed according to polarization selection rules. The obtained binding energies for AA, AB, and BB biexcitons are 15.6, 16.6, and 4.7 meV, respectively. A brief discussion is also given on the contribution of biexciton and two-pair continuum resonances to the FWM signal.

    Original languageEnglish
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume68
    Issue number11
    DOIs
    Publication statusPublished - 2003 Jul 15

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    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

    Cite this

    Hazu, K., Sota, T., Suzuki, K., Adachi, S., Chichibu, S. F., Cantwell, G., Eason, B., Reynolds, C., & Litton, W. (2003). Strong biexcitonic effects and exciton-exciton correlations in ZnO. Physical Review B - Condensed Matter and Materials Physics, 68(11). https://doi.org/10.1103/PhysRevB.68.033205