Publication
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.
Anders Meibom, Stéphane Laurent Escrig, Lukas Baumgartner, Florence Bégué
Victor Panaretos, Neda Mohammadi Jouzdani
Johann Michler, Xavier Maeder, Laszlo Pethö, Amit Sharma