TY - JOUR
T1 - Optical studies of the correlation between interface disorder and the photoluminescence line shape in GaAs/InGaP quantum wells
AU - Laureto, E.
AU - Meneses, E. A.
AU - Carvalho, W.
AU - Bernussi, A. A.
AU - Ribeiro, E.
AU - Da Silva, E. C.F.
AU - De Oliveira, J. B.B.
PY - 2002
Y1 - 2002
N2 - Photoluminescence (PL) and excitation PL measurements have been performed at different temperatures in a number of lattice-matched GaAs/In0.49Ga0.51P quantum wells, where the fluctuations of the potential energy are comparable with the thermal energy of the photocreated carriers. Two samples with different well widths allow to observe a series of anomalous effects in their optical response. The observed effects are related to the disorder ia the interface, characterizing fluctuations in the confinement potential energy. It is proposed that the carrier relaxation processes occur either at the local minima or at the absolute minimum of the confinement potential, depending on the ratio of the thermal energy and the magnitude of the potential fluctuations.
AB - Photoluminescence (PL) and excitation PL measurements have been performed at different temperatures in a number of lattice-matched GaAs/In0.49Ga0.51P quantum wells, where the fluctuations of the potential energy are comparable with the thermal energy of the photocreated carriers. Two samples with different well widths allow to observe a series of anomalous effects in their optical response. The observed effects are related to the disorder ia the interface, characterizing fluctuations in the confinement potential energy. It is proposed that the carrier relaxation processes occur either at the local minima or at the absolute minimum of the confinement potential, depending on the ratio of the thermal energy and the magnitude of the potential fluctuations.
UR - http://www.scopus.com/inward/record.url?scp=0035995013&partnerID=8YFLogxK
U2 - 10.1590/S0103-97332002000200017
DO - 10.1590/S0103-97332002000200017
M3 - Article
AN - SCOPUS:0035995013
VL - 32
SP - 314
EP - 317
JO - Brazilian Journal of Physics
JF - Brazilian Journal of Physics
SN - 0103-9733
IS - 2 A
ER -