Biexcitons and their dephasing processes in ZnO

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


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
Issue number2
Publication statusPublished - 2005

ASJC Scopus subject areas

  • Condensed Matter Physics


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