TY - JOUR
T1 - Confined multiexciton states of GaAs/AlGaAs quantum dots grown on a (411)A GaAs surface
AU - Watatani, C.
AU - Edamatsu, K.
AU - Itoh, T.
AU - Hayashi, H.
AU - Shimomura, S.
AU - Hiyamizu, S.
PY - 2001/3
Y1 - 2001/3
N2 - We have investigated the micro photoluminescence (micro-PL) spectra of a single GaAs/AlGaAs quantum dot (QD) grown on a (411)A GaAs substrate, and observed sharp luminescence lines. These luminescence lines are classified into three types in terms of their excitation-power dependence. For one of them the intensity increases linearly with excitation power density, and the others that appear at the lower and higher energy sides of the linear one exhibit superlinear dependence. The difference in the excitation-power dependence reflects the number of excitons created in a QD, namely, the linear dependence originates from the lowest state of a confined exciton, and the others from biexcitonic and multiple exciton states.
AB - We have investigated the micro photoluminescence (micro-PL) spectra of a single GaAs/AlGaAs quantum dot (QD) grown on a (411)A GaAs substrate, and observed sharp luminescence lines. These luminescence lines are classified into three types in terms of their excitation-power dependence. For one of them the intensity increases linearly with excitation power density, and the others that appear at the lower and higher energy sides of the linear one exhibit superlinear dependence. The difference in the excitation-power dependence reflects the number of excitons created in a QD, namely, the linear dependence originates from the lowest state of a confined exciton, and the others from biexcitonic and multiple exciton states.
UR - http://www.scopus.com/inward/record.url?scp=0035529723&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035529723&partnerID=8YFLogxK
U2 - 10.1002/1521-3951(200103)224:2<353::AID-PSSB353>3.0.CO;2-V
DO - 10.1002/1521-3951(200103)224:2<353::AID-PSSB353>3.0.CO;2-V
M3 - Article
AN - SCOPUS:0035529723
SN - 0370-1972
VL - 224
SP - 353
EP - 356
JO - Physica Status Solidi (B): Basic Research
JF - Physica Status Solidi (B): Basic Research
IS - 2
ER -