{TAIL ~ A bulk GaN layer} is grown on {HEAD ~ the transitional layer} by HVPE under the substantially 2D growth mode 
{ TAIL ~ A bulk GaN layer } is grown on { HEAD ~ the transitional layer } by HVPE under the substantially 2D growth mode
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH