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Proceedings Paper

Scattering processes and dynamics of exciton-biexciton system in GaN
Author(s): Satoru Adachi; Kouji Hazu; Takayuki Sota; Shigefusa F. Chichibu; Takashi Mukai; Shunichi Muto; Katsuo Suzuki
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Paper Abstract

Bound and unbound biexcitons in a free-standing bulk GaN are investigated by time-integrated and spectrally-resolved 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.

Paper Details

Date Published: 30 May 2003
PDF: 14 pages
Proc. SPIE 4992, Ultrafast Phenomena in Semiconductors VII, (30 May 2003);
Show Author Affiliations
Satoru Adachi, Hokkaido Univ. (Japan)
CREST, Japan Science and Technology Corp. (Japan)
Kouji Hazu, Waseda Univ. (Japan)
Takayuki Sota, Waseda Univ. (Japan)
Shigefusa F. Chichibu, Univ. of Tsukuba (Japan)
Takashi Mukai, Nichia Corp. (Japan)
Shunichi Muto, Hokkaido Univ. (Japan)
CREST, Japan Science and Technology Corp. (Japan)
Katsuo Suzuki, Waseda Univ. (Japan)

Published in SPIE Proceedings Vol. 4992:
Ultrafast Phenomena in Semiconductors VII
Kong-Thon F. Tsen; Jin-Joo Song; Hongxing Jiang, Editor(s)

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