Maximizing Photonic Response with Simple Resonating Structures in Various Geometries*

Resonances are all over us in multiple forms concerning the collaboration of two (or more) parts in order to maximize an output. In Photonics, the effect is interpreted as an optimally balanced regime between electric and magnetic response in domains with different optical axes or opposite-sign permittivities. In this talk, we examine simple structures of different geometries serving various purposes from large wave polarization conversion to efficient absorbance and maximal scattering.

Firstly, we consider a planar structure consisting of two slabs positioned back-to-back with different thicknesses but the same binary multilayered texture. By rotating in-plane the two slabs, we aim at tilting the linearly polarized incident field by 90 degrees; it is a particularly challenging task when working with such simple configurations.

Secondly, an isolated core-shell nanowire, where the resonance occurs between the metallic cylinder and the semi-conducting coat, is regarded. The potential of these realistic designs to operate as switches, sensors or as components in filtering and tagging optical systems, is also identified by evaluating the corresponding frequency responses.