Abstract

Non-linear amplification phenomena in a semiconductor microcavity due to a stimulated redistribution of polaritons in momentum space have recently attracted considerable interest.¹ However at the elevated carrier densities used in these experiments the dielectrical properties of the cavity are modified, leading to additional optical non-linearities. The role of these changes has not been studied up to now. In order to clarify this issue we investigate the optical response of a cavity in transmission as well as in reflection geometry. For this purpose pump-probe experiments have been performed, where the pump angle corresponds to the so-called magic angle for stimulated polariton scattering and the probe beam is perpendicular to the sample surface.

© 2001 Optical Society of America