The dynamics of one-dimensional (1D) excitons is investigated in a GaAs/AlAs quantum wire array (QWR-A) using picosecond time resolved photoluminescence (PL) measurements. The excitation density is 4×10⁴cm^-1, a factor of 20 below the Mott density. The rise and decay time constants of the excitonic PL in the QWR-A are 55 and 450 psec, respectively. The exciton formation time in 1D is determined to be ≈30psec. Our results suggest that exciton-acoustic-phonon scattering is enhanced in 1D. However, the rates of exciton scattering with carriers and excitons is reduced.
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Kumar et al. (1998) studied this question.
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