a semiconductor nanocrystal layer disposed on the grating, the layer including a plurality of semiconductor nanocrystals including a Group II VI compound, {HEAD ~ the nanocrystals} being distributed in {TAIL ~ a metal oxide matrix} 
distributed in
a semiconductor nanocrystal layer disposed on the grating , the layer including a plurality of semiconductor nanocrystals including a Group II VI compound , { HEAD ~ the nanocrystals } being distributed in { TAIL ~ a metal oxide matrix }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL