Design of patterned sapphire substrates for GaN-based light-emitting diodes*
Wang Hai-Yana), Lin Zhi-Tinga), Han Jing-Leia), Zhong Li-Yia), Li Guo-Qianga),b)
       
(a) Luminous fluxes from each facet and (b) total luminous flux of DPSS LED.