Comparative Study of Photonic Defective Comb-Like Structure by the Green Function and the Transfer Matrix MethodTarik Touiss, Siham Machichi, Younes Errouas, Ilyass El Kadmiri, Farid Falyouni and Driss BriaE3S Web of Conf., 469 (2023) 00044DOI: https://doi.org/10.1051/e3sconf/202346900044