{HEAD ~ A light emitting device} of the invention comprises {TAIL ~ a light emitting layer} on a substrate and mode conversion means for converting the mode from the guided mode into an emission mode 
comprises
{ HEAD ~ A light emitting device } of the invention comprises { TAIL ~ a light emitting layer } on a substrate and mode conversion means for converting the mode from the guided mode into an emission mode
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH