TY - JOUR
T1 - Biexcitons and their dephasing processes in ZnO
AU - Adachi, Satoru
AU - Hazu, Kouji
AU - Sota, Takayuki
AU - Chichibu, Sigefusa
AU - Cantwell, Gene
AU - Reynolds, Donald C.
AU - Litton, Cole W.
PY - 2005
Y1 - 2005
N2 - 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.
AB - 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.
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U2 - 10.1002/pssc.200460332
DO - 10.1002/pssc.200460332
M3 - Article
AN - SCOPUS:27344442113
SN - 1610-1634
VL - 2
SP - 890
EP - 895
JO - Physica Status Solidi C: Conferences
JF - Physica Status Solidi C: Conferences
IS - 2
ER -