| e report a detailed study of the photoluminescence, magneto-photoluminescence, and time-resolved photoluminescence of bulk n-type InSb at 2 K.;Photoluminescence spectra are observed at pump intensities as low as 100 mW/cm;We report for the first time a quantitative analysis of the magneto-photoluminescence spectra of InSb. The zero field, band edge peak splits into three distinct peaks. The two high energy peaks are due to recombination of the two lowest spin-split Landau levels. The low energy peak is quantitatively shown to be due to recombination of magneto-excitons. The pump intensity dependence of the excitonic peak suggests that the spectral-position of the exciton luminescence is independent of electron-hole pair density.;Time-resolved photoluminescence reveals two channels for recombination: (1) a fast channel and (2) a slow channel. The fast recombination corresponds to band-to-band recombination, has a decay time of the order of 60 nsec, and is accompanied by time-resolved band gap renormalization. The slow channel corresponds to band-to-acceptor transitions and occurs with a time constant on the order of 4... |
