Time-resolved Raman studies of non-equilibrium excitations in GaAs-AlAs and GaAs-Al sub x Ga sub 1 minus x As multiple quantum well structuresstructures

In this paper, recent experimental results obtained from time-resolved Raman studies in GaAs-AlAs and GaAs-Al{sub x}Ga{sub 1{minus}s}As multiple quantum well structures are reviewed. Particular emphasis is made on electron-phonon and phonon-phonon interactions and their association with the hot-phonon effects in the hot-carrier dynamics of multiple quantum well structures; and the transport properties of photoexcited electron-hole plasma and excitons in semiconductor multiple quantum well structures.