RHEED analysis of the grown MQW. The image shows spots of the 2 × 1 surface reconstruction (black arrows) superimposed to those of the initial 1 × 1 symmetry (white arrows). The presence of this diffraction pattern guarantees for a clean surface and a good two-dimensional epitaxial growth.
Irrera et al. Nanoscale Research Letters 2014 9:74 doi:10.1186/1556-276X-9-74