Binding of quasi two-dimensional biexcitons

Summary form only given. In this presentation we report on a determination of the biexciton binding energies in GaAs-AlGaAs quantum wells of different widths and the results of a theoretical calculation of the ratio of the biexciton binding energy to that of the exciton. We determine the binding energies using spectrally resolved transient four-wave mixing (TFWM) and photoluminescence (PL).