We study semi-analytically the light emission and absorption properties ofarbitrary stratified photonic structures with embedded two-dimensionalmagnetoelectric point scattering lattices, as used in recent plasmon-enhancedLEDs and solar cells. By employing dyadic Green's function for the layeredstructure in combination with Ewald lattice summation to deal with the particlelattice, we develop an efficient method to study the coupling between planar 2Dscattering lattices of plasmonic, or metamaterial point particles, coupled tolayered structures. Using the `array scanning method' we deal with localizedsources. Firstly, we apply our method to light emission enhancement of dipoleemitters in slab waveguides, mediated by plasmonic lattices. We benchmark thearray scanning method against a reciprocity-based approach to find that thecalculated radiative rate enhancement in k-space below the light cone showsexcellent agreement. Secondly, we apply our method to studyabsorption-enhancement in thin-film solar cells mediated by periodic Agnanoparticle arrays. Lastly, we study the emission distribution in k-space of acoupled waveguide-lattice system. In particular, we explore the dark modeexcitation on the plasmonic lattice using the so-called Array Scanning Method.Our method could be useful for simulating a broad range of complex nanophotonicstructures, i.e., metasurfaces, plasmon-enhanced light emitting systems andphotovoltaics.
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