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