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