Subnanosecond spectral diffusion of a single quantum dot in a nanowire
  We have studied spectral diffusion of the photoluminescence of a single CdSe quantum dot inserted in a ZnSe nanowire. We have measured the characteristic diffusion time as a function of pumping power and temperature using a recently developed technique [G. Sallen et al, Nature Photon. \textbf{4}, 696 (2010)] that offers subnanosecond resolution. These data are consistent with a model where only a \emph{single} carrier wanders around in traps located in the vicinity of the quantum dot. 
G. Sallen, A. Tribu, T. Aichele, R. Andr\'e, L. Besombes, C. Bougerol,   M. Richard, S. Tatarenko, K. Kheng, and J.-Ph. Poizat
cond-mat.mes-hall cond-mat.mtrl-sci