TY - JOUR
T1 - Exciton-exciton correlation effects on FWM in GaN
AU - Adachi, Satoru
AU - Sasakura, Hirotaka
AU - Muto, Shunichi
AU - Hazu, Kouji
AU - Sota, Takayuki
AU - Chichibu, Shigefusa F.
AU - Mukai, Takashi
PY - 2003/11/1
Y1 - 2003/11/1
N2 - 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 (XX AB) as well as A biexcitons and their unbound biexciton are clearly observed. Through the FWM spectra and delay-time dependence, it is found that 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*). This interaction is found to play an important role in the FWM signals for all polarizations.
AB - 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 (XX AB) as well as A biexcitons and their unbound biexciton are clearly observed. Through the FWM spectra and delay-time dependence, it is found that 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*). This interaction is found to play an important role in the FWM signals for all polarizations.
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U2 - 10.1002/pssb.200303254
DO - 10.1002/pssb.200303254
M3 - Article
AN - SCOPUS:0344926523
SN - 0370-1972
VL - 240
SP - 348
EP - 351
JO - Physica Status Solidi (B): Basic Research
JF - Physica Status Solidi (B): Basic Research
IS - 2
ER -