Biexcitons and their dephasing processes in ZnO

Satoru Adachi, Kouji Hazu, Takayuki Sota, Sigefusa Chichibu, Gene Cantwell, Donald C. Reynolds, Cole W. Litton

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Abstract

We have investigated free excitons and biexcitons of bulk ZnO by time-integrated and spectrally-resolved four-wave mixing. The polarization- and wave-vector-dependent FWM signals for A and B excitons demonstrate clearly that the valence-band ordering is A - Γ9, B - Γ7, and C - Γ7. Next, we gave qualitative explanation of the FWM signals induced by excitons and biexcitons in ZnO. For negative delay times, bound and unbound AB-biexcitons (A exciton-B exciton correlation), which have been considered to play a minor role in GaAs heterostructures, was found to play an important role and give a significant qualitative impact to the optical response of ZnO.

Original languageEnglish
Pages (from-to)890-895
Number of pages6
JournalPhysica Status Solidi C: Conferences
Volume2
Issue number2
DOIs
Publication statusPublished - 2005 Nov 7

ASJC Scopus subject areas

  • Condensed Matter Physics

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    Adachi, S., Hazu, K., Sota, T., Chichibu, S., Cantwell, G., Reynolds, D. C., & Litton, C. W. (2005). Biexcitons and their dephasing processes in ZnO. Physica Status Solidi C: Conferences, 2(2), 890-895. https://doi.org/10.1002/pssc.200460332