Fabrication of 2D photonic crystals using block copolymer patterns on as grown LEDs

► Deposition of LED structure. ► Fabrication of polymer patterns on topmost layer of as grown LED using PS-b-PMMA diblock copolymer. ► Transfer of polymer pattern to p-GaN of LED by RIE or PEC etching. ► Data plot of PL and EL in patterned LED.