Non-Markovian nature of exciton-exciton scattering in a GaAs single quantum well observed by phase-locked laser pulses

南不二雄, FUJIO MINAMI

A. Iwamatsu, Yoshihiro Ogawa, Yasuyoshi Mitsumori +1 more

南不二雄, F. Minami

Yoshihiro Ogawa, Hirokazu Tahara, F. Minami

We report the non-Markovian nature of heavy hole-heavy hole and heavy hole-light hole exciton scattering in a GaAs single quantum well. The homogeneous width depends on the exciton population, which is controlled by the delay time of phase-locked pulses. This effect is explained on the basis of excitation-induced dephasing in Markovian approximation. For short times, the homogeneous width decreases and deviates from the Markovian behavior, due to the non-Markovian behavior of the exciton-exciton scattering. We analyze the homogeneous width by using a weakly interacting boson model including the non-Markovian effect. The correlation time of the exciton-exciton scattering is estimated as 0.43 ps.

J. Kühl, A. Honold, Lothar Schultheis +1 more

Yoshihiro Ogawa, F. Minami

We show the coherent control of the non‐Markovian oscillation of exciton‐folded acoustic phonon scattering in GaAs multiple‐quantum wells by using four‐wave mixing measurements. The extent of non‐Markovian scattering is suppressed when the delay time between the phase‐locked pulses corresponds to half the period of the non‐Markovian oscillation.