Figure 7From: A study of nitrogen incorporation in pyramidal site-controlled quantum dots Polarisation-dependent photoluminescence intensity mapping of the QD from the sample B2. Due to exchange interaction and low rotational symmetry, two linearly polarised components are resolved in exciton (X) and biexciton (XX) transitions. Fine-structure splitting of 90 μeV can be resolved directly from the energetic distance between polarised components in each of the doublets. The third transition X* is identified as generic charged exciton.Back to article page