Quasi-two-dimensional electron-hole plasma in GaAs-GaAlAs MQW structures: Band-filling effects and band-gap renormalization

Abstract We investigated the photoluminescence of the electron-hole plasma in quasi-two-dimensional GaAs-GaAlAs multiple quantum well structures. Compared to the case of a three-dimensional plasma particularly strong band filling and large band-gap renormalization are observed. The dependence of the band filling and band-gap renormalization on the plasma density can be described quantitatively assuming recombination between electron and hole subbands including forbidden but parity-allowed transitions.