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