Abstract
A metal layer formed on the backside of InGaN∕sapphire-based light-emitting diodes deteriorates the inherent optical power output. An experimental approach of a suspended die is employed to study the effects of such metal layers via a direct comparison in radiant flux from a discrete die with and without a reflector. A sphere package that employs no reflector is proposed and fabricated. Light extraction of the sphere design is discussed; a light source in the sphere package would not have to be either an ideal point or placed at the center of the sphere, due to a finite critical angle at the sphere∕air interface.
© 2007 Optical Society of America
Full Article | PDF ArticleMore Like This
Y. Park, K. H. Li, W. Y. Fu, Y. F. Cheung, and H. W. Choi
Appl. Opt. 57(10) 2452-2458 (2018)
Yu-Chieh Huang, Chia-Feng Lin, Sy-Hann Chen, Jing-Jie Dai, Guei-Miao Wang, Kun-Pin Huang, Kuei-Ting Chen, and Yi-Hsiang Hsu
Opt. Express 19(S1) A57-A63 (2011)
Xingxing Liu, Yun Mou, Hao Wang, Renli Liang, Xinzhong Wang, Yang Peng, and Mingxiang Chen
Appl. Opt. 57(25) 7325-7328 (2018)