Efficiency droop suppression of distance-engineered surface plasmon-coupled photoluminescence in GaN-based quantum well LEDs
Ag coated microgroove with extreme large aspect-ratio of 500:1 was fabricated on p-GaN capping layer to higgs bookcase investigate the coupling behavior between quantum wells and surface plasmon in highly spatial resolution.Significant photoluminescence enhancement was observed when the distance between Ag film and QWs was reduced from 220 nm to ab