Abstract

Recent progress in ultrashort laserpulse spectroscopy allows to investigate the relaxation kinetics of nonequilibrium semiconductor carrier distributions. In recent experiments^[1−3] an initial high-density noneqilibrium carrier distribution has been excited by femtosecond lightpulses. The successive relaxation takes place on a timescale of about one hundred femtoseconds and is mainly caused by the inelastic carrier-carrier collisions for situations with a moderate excess energy. In the present contribution we study in detail the kinetics due to carrier-carrier scattering beyond a lifetime approximation for the relatively simple model of a homogeneous, quasi-twodimensional electron gas in a parabolic energy band^[4].

© 1992 IQEC