{HEAD ~ A structure} including a grating and {TAIL ~ a semiconductor nanocrystal layer} on the grating, can be a laser 
including
{ HEAD ~ A structure } including a grating and { TAIL ~ a semiconductor nanocrystal layer } on the grating , can be a laser
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH