Figure 5From: Submonolayer Quantum Dots for High Speed Surface Emitting LasersHRTEM (a) and processed HRTEM (b) images of stacked InAs 0.5 ML islands inserted into a 1.2 nm GaAs layer in an Al0.4Ga0.6As matrix. (b) shows a color-coded map of the local increase of the lattice parameter in the vertical direction. Substrate temperature is 490 °CBack to article page