Gebre, Ashenafi Abera, and Kedir Botamo Adem. “Numerical Design and Optoelectronic Simulation of a Germanium-on-Silicon PIN Photodetector for High-Speed Optical Communication Systems”. International Journal of Applied Mathematics, Sciences, and Technology for National Defense, vol. 4, no. 2, July 2026, pp. 83-94, https://doi.org/10.58524/app.sci.def.v4i2.1232.