Syahriar, A., Syahriar, N.R. , Suada, M.G. , Rahayu, K.M. , samijayani , O.N. and Lubis, A.H. 2026. One-dimensional Photonic Crystal with Defects to Detect Gelatine Containing Water. Journal of Engineering and Technological Sciences. 58, 5 (Aug. 2026), 652–660. DOI:https://doi.org/10.5614/j.eng.technol.sci.2026.58.5.4.