Crystal orientation dependent performance of cubic InGaN QW blue-violet laser

In this paper, the crystal orientation-dependent electronic and optical performance of a compressively strained quantum well (QW) blue-violet Vertical Cavity Surface Emitting Laser (VCSEL) is numerically simulated using MATLAB. It is found that there is a strong correlation between the crystal orientation and the energy band dispersion and hence the optical emission spectrum of the laser. The peak gain and peak emission wavelength depend on the orientation-dependent fundamental energy gap, energy separation between the HH1 and LH1 subbands, and momentum matrix element. It is observed that the maximum and minimum gain of the VCSEL is 1150 and 920 cm-1 corresponding to the (112) and (110) crystal orientations, respectively, and also the peak emission wavelength can be shifted from 454 nm to 462 nm with the change in crystal orientation from (001) to (110).