Surface lattice resonances and bound states in nanoparticle arrays for opto-electronic applications

Abstract

Small metallic and dielectric particles behave as dipolar resonators with a resonant frequency determined by their size. When these resonators are placed in a periodic array, they can couple with diffraction orders forming collective modes, which are called surface lattice resonances (SLRs). SLRs lead to large field enhancements over extended areas, forming an ideal system for collective strong light-matter coupling and for optoelectronic applications. SLRs can also lead to Bound States in the Continuum (BICs), with full suppression of the radiation leakage and divergent Q-factors. In this presentation, we describe in detail SLRs and BICs in metallic and dielectric arrays, and the associated phenomena emerging from their coupling to quantum emitters and excitons in organic semiconductors. These phenomena include improved light emission and extraction from quantum wells and low threshold polariton lasing.