This work introduces an interesting configuration for exciting structured surface plasmon-polaritons (SSPP) by analyzing wave propagation on a composite dielectric-metal surface. In particular, we focus on the coupling of interfered evanescent waves with structured SPP. This innovative approach unlocks new avenues for enhancing plasmon optics models, encompassing diffraction, interference, and focalization. By exploring the potential of this configuration, we improved the understanding and application of structured SPP in various optical phenomena.
Geovanni Arenas Muñoz, Ilsse I. Cazares Aguilar, Elizabeth Saldivia Gomez, Juan C. Atenco Cuautle, Fabian Cubillos Morales, Andrea Garcia Guzman, Patricia Martinez Vara, Gabriel Martinez Niconoff
In this paper, the expression for the dispersion relation function for evanescent waves (EWs) is obtained. This expression establishes the basis of the two-dimensional optics where EWs are involved. We make use of the nonhomogeneous character of these types of waves. The dispersion relation function was implemented to analyze the interference effects showing that the resulting optical field has easily tunable polarization features, which were characterized through a set of Poincare’s spheres with its corresponding coherence matrix representation. The interference model was generalized to describe the diffraction effects by proposing the angular spectrum model with EWs. The analysis was further extended to describe the synthesis of evanescent self-imaging optical fields.
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