Fig. 13: Description of the sample structure.
From: Single photon emission and recombination dynamics in self-assembled GaN/AlN quantum dots

a 1 × 1 µm2 AFM image taken in height mode of the top plane of GaN QDs displaying a broad distribution of dot sizes. b 26 × 26 µm2 secondary electron image of the SA QD sample after evaporation of the top QD plane and etching into mesa structures. The displayed mesa is 1 µm wide. c Sketch of the mesa structure. In practice, several QDs can be present on each mesa depending upon their dimension