Excited-state radiative lifetimes in self-assembled quantum dots obtained from state-filling spectroscopy

a uniformly excited ensemble of InAs islands, the emission intensities of t he allowed radiative transitions are modeled in the state-filling limit for pulsed and steady-state excitation as a function of the average number of electron-hole pairs per dot. The only unknown parameters included in the eq uations are the radiative recombination rates of each transition. For stead y-state excitation, it is found that in the high excitation limit the emiss ion intensity ratio of any two transitions tends towards a well-defined val ue proportional to the ratio of their recombination rates. The results of t he model are compared with experiments for steady-state excitation and exci ted states radiative lifetimes are obtained experimentally. [S0163-1829(99) 08811-6].