This thesis examines photoluminescence spectra and polarized photoluminescence spectra of coupled semiconductor quantum dots. Previous results on the polarization memory of charge states in single quantum dots have demonstrated that different excitonic charge states have identifiable polarization signatures [1,2,3]. Our results indicate that coupled quantum dots have similar polarization signatures to single quantum dots. New studies on polarization memories of anticrossing regions in coupled quantum dots were undertaken, and polarization memories of anticrossing lines were tracked through the anticrossing region. Preliminary results indicate that the polarization memory of anticrossing lines shows a marked decrease with bias, reaches a minima at the centre of the anticrossing region, and then starts increasing again.
This work helps in the identification of spins, a necessary first step towards achieving spin control in quantum dots for the production of qubit states for quantum processing, and lays the groundwork for the production of entangled photon pairs.