Figure 1.

Cross-sectional SEM images of a the GaN crystals at an intermediate growth stage, b after full coalescence. c Schematic representation of the crystal growth during asymmetric ELO. The lines inclined at 32° from the surface represent the BSFs. The a and +c numbers refer to the crystallographic directions [11−20] and [0001], respectively

Kriouche et al. Nanoscale Research Letters 2010 5:1878-1881   doi:10.1007/s11671-010-9724-9