@article{Moret:147855,
      title = {Diffusion of electron-hole pairs in disordered quantum  wires},
      author = {Moret, N. and Oberli, D. Y. and Dwir, B. and Rudra, A. and  Kapon, E.},
      publisher = {American Institute of Physics},
      journal = {Applied Physics Letters},
      volume = {93},
      pages = {192101},
      year = {2008},
      abstract = {The diffusivity of photogenerated electron-hole pairs in  weakly disordered GaAs/AlGaAs V-groove quantum wires was  measured using a photoluminescence (PL) time-of-flight  technique. It is shown that the electron-hole pair  diffusion is thermally activated above about 50 K. Exciton  localization is observed in micro-PL (mu PL) spectra at low  temperature. A reduction in the Stokes shift is found to  accompany the increase in the diffusion coefficient.  Nevertheless, localization-related features in the mu PL  spectra disappear at intermediate temperatures, before  measurable diffusion occurs.},
}