Abstract

Intra- and intervalence band scattering are important for the ultrafast nonequilibrium dynamics of hot holes in semiconductors. Until now, these phenomena have mainly been investigated by means of the subpicosecond time evolution of interband absorption¹ or luminescence² due to a photoexcited electron-hole plasma. In this paper we present the first, to our knowledge, time-resolved observation of intervalence band scattering and hole thermalization in a p-type material by monitoring the transient intervalence band absorption with the help of femtosecond pulses in the mid-infrared.

© 1993 Optical Society of America