Shafiq, A.L. et al. 2026. Modeling the Influence of Nitrogen Concentration on Optical Gain Performance in Gallium Nitride Arsenide/Gallium Arsenide Quantum Wells Vertical-cavity Surface-emitting Lasers. ARO-THE SCIENTIFIC JOURNAL OF KOYA UNIVERSITY. 14, 1 (Apr. 2026), 192–201. DOI:https://doi.org/10.14500/aro.12716.