TY - JOUR
T1 - Nonlinear Response of Localized Excitons: Effects of the Excitation-Induced Dephasing
AU - Borri, Paola
AU - Langbein, Wolfgang Werner
AU - Birkedal, Dan
AU - Lyssenko, V. G.
AU - Hvam, Jørn Marcher
PY - 1997
Y1 - 1997
N2 - The polarization dependence of the ultrafast nonlinear response of localized excitons in GaAs/AlGaAs quantum wells has been investigated by spectrally resolved, transient four-wave mixing. The role of the excitation-induced dephasing in the delay dependence of the signal is discussed in detail. In particular, we show experimentally that the excitation-induced dephasing gives rise to a photon echo in inhomogeneous systems. We develop a simple analytical model for the delay dependence of the signal, which enables us to deduce the dephasing time from the four-wave mixing decay.
AB - The polarization dependence of the ultrafast nonlinear response of localized excitons in GaAs/AlGaAs quantum wells has been investigated by spectrally resolved, transient four-wave mixing. The role of the excitation-induced dephasing in the delay dependence of the signal is discussed in detail. In particular, we show experimentally that the excitation-induced dephasing gives rise to a photon echo in inhomogeneous systems. We develop a simple analytical model for the delay dependence of the signal, which enables us to deduce the dephasing time from the four-wave mixing decay.
U2 - 10.1002/1521-396X(199711)164:1<61::AID-PSSA61>3.0.CO;2-R
DO - 10.1002/1521-396X(199711)164:1<61::AID-PSSA61>3.0.CO;2-R
M3 - Journal article
SN - 0031-8965
VL - 164
SP - 61
EP - 65
JO - PHYSICA STATUS SOLIDI A-APPLIED RESEARCH
JF - PHYSICA STATUS SOLIDI A-APPLIED RESEARCH
IS - 1
ER -