Scattering processes and dynamics of exciton-biexciton system in GaN

Satoru Adachi*, Kouji Hazu, Takayuki Sota, Shigefusa F. Chichibu, Takashi Mukai, Shunichi Muto, Katsuo Suzuki

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)


Bound and unbound biexcitons in a free-standing bulk GaN are investigated by time-integrated and spectrallyresolved four-wave mixing measurements, where the formation of hetero-biexcitons that consist of A and B excitons (XXAB) as well as A-biexcitons (XXAA) and their unbound biexciton (XX AA) are clearly observed. The FWM spectra and delay-Time dependence are explained qualitatively and the interaction between A-And B-excitons gives rise to the phase shifts of the quantum beating and the energy shifts of the spectra, which is considered as the effect of the unbound state of XXAB (i.e. XX AB). The unbound A-biexciton (XX AA) is also observed clearly in spectral and temporal domain and is found to play an important role in FWM signals for all polarizations.

Original languageEnglish
Pages (from-to)188-201
Number of pages14
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2003 May 30
EventUltrafast Phenomena in Semiconductors VII 2003 - San Jose, United States
Duration: 2003 Jan 252003 Jan 31


  • Biexciton
  • Exciton-Exciton Correlation
  • Four-Wave Mixing
  • GaN

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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