Periodic plasmonic nanostructures are promising in solid-state lighting scenarios for controlling photoluminescence directivity and efficiency. The inhomogeneous spatial distribution of the plasmonic resonances means that their influence on emission is strongly dependent on the position of emitters. Here we demonstrate superresolution mapping as a technique to map the local dependence of directivity, efficiency, and emission rate enhancements. We show superresolved measurements of the local density of states (LDOS) at 605 nm induced by a hexagonal lattice of aluminum nanoantennas with a spatial resolution of 40 nm, Our method is superior to near-field mapping of emission rates.
|||K. Guo, M. A. Verschuuren, and A. F. Koenderink, Superresolution Imaging of the Local Density of States in Plasmon Lattices, Optica 3, 289–298, (2016).||(p)reprint DOI|