Different influences of u-InGaN upper waveguide on the performance of GaN-based blue and green laser diodes |
(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. |