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