Different influences of u-InGaN upper waveguide on the performance of GaN-based blue and green laser diodes
Liang Feng1, 2, Zhao De-Gang1, 3, †, Jiang De-Sheng1, Liu Zong-Shun1, Zhu Jian-Jun1, Chen Ping1, Yang Jing1, Liu Wei1, Li Xiang1, Liu Shuang-Tao1, Xing Yao1, Zhang Li-Qun4, Li Mo5, Zhang Jian5
       

(color online) Optical characteristics of blue and green LDs: (a) center of optical field, (b) FWHM of the optical field, (c) optical confinement factor, and (d) total optical loss. The interface between n-GaN CL and the active region, and the interface between the active region and u-InGaN UWG are marked by yellow and magenta dashed-dotted lines, respectively.