Abstract

Previous experiments of magnetoexcitons in intrinsic quantum wells (QW’s) have shown that thermalization is considerably slowed down in high magnetic fields.¹ This has been assigned to the change in dimensionality under those conditions. Since thermalization is not sensitive to the total scattering rate, this result does not imply its overall decrease as the dimensionality is varied when a high magnetic field is applied. On the other hand, four-wave mixing (FWM) is a much more powerful tool for studying the different scattering processes that contribute to dephasing

© 1993 Optical Society of America