Design and optimization of an OR gate all optical circuit based on silicon photonic crystalsR. Bchir, A. Bardaoui, M. Machhout, R. Chtourou and H. EzzaouiaEur. Phys. J. Appl. Phys., 56 3 (2011) 30501DOI: https://doi.org/10.1051/epjap/2011100327