Epitaxial overgrowth of semi-polar III-nitride layers and devices often leads to arrowhead-
shaped surface features, referred to as chevrons. We report on a study into the optical,
structural, and electrical properties of these features occurring in two very different semi-
polar structures, a blue-emitting multiple quantum well structure, and an amber-emitting light-
emitting diode. Cathodoluminescence (CL) hyperspectral imaging has highlighted shifts in
their emission energy, occurring in the region of the chevron. These variations are due to …