Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Hyun Kyu Kim and Hyung Gu Kim and Hee Yun Kim,Light output power enhancement of GaN-based light emitting diodes with periodic deflector embedded on the wet etch patterned sapphire substrate,Japanese journal of applied physics : JJAP,00214922,Tokyo : The Japan Society of Applied Physics,2011-04,50,4,042102,https://cir.nii.ac.jp/crid/1520853832889763584,https://doi.org/10.1143/jjap.50.042102