Surface plasmon-polariton waves propagation and excitation along the direction of periodicity of the one-dimensional photonic crystal

The surface plasmon-polariton (SPP) waves guided by one-dimensional photonic crystals (1DPCs) are usually excited at the interface perpendicular to the direction of periodicity. In this work, we will present the formulation and the numerical results delineating the excitation of the SPP waves on the interface perpendicular to the direction of periodicity. Both the eigenvalue problem of finding and solving the dispersion equation and the problem of the excitation of the SPP waves will be discussed. The eigenvalue problem is solved using the rigorous coupled-wave approach. The results indicate the presence of the plasmonic bandgap that can help in designing the plasmonic optical filters.

References:
1- M. Rasheed and M. Faryad, “Rigorous formulation of surface plasmon-polariton-waves propagation along the direction of periodicity of one-dimensional photonic crystal,” Journal of Optical Society of America B, 35, 2957-2962 (2018).
2- M. Kamran and M. Faryad, “Excitation of surface plasmon-polariton waves along the direction of periodicity of a one-dimensional photonic crystal,” Physical Review A, 99, 053811 (2019).