We investigate a periodic array of aluminum nanoantennas embedded in a light-emitting slab waveguide. By varying the waveguide thickness we demonstrate the transition from weak to strong coupling between localized surface plasmons in the nanoantennas and refractive index guided modes in the waveguide. We experimentally observe a non-trivial relationship between extinction and emission dispersion diagrams across the weak to strong coupling transition. These results have implications for a broad class of photonic structures where sources are embedded within coupled resonators. For nanoantenna arrays, strong vs. weak coupling leads to drastic modifications of radiation patterns without modifying the nanoantennas themselves, thereby representing an unprecedented design strategy for nanoscale light sources

Additional Metadata
Publisher APS
Reviewer E.C. Garnett (Erik)
Persistent URL dx.doi.org/10.1103/PhysRevB.90.235406
Journal Phys. Rev. B
Rodriguez, S.R.K, Chen, Y, Steinbusch, T.P, Verschuuren, M.A, Koenderink, A.F, & Gómez Rivas, J. (2014). From weak to strong coupling of localized surface plasmons to guided modes in a luminescent slab. Phys. Rev. B, 90(Article number: 235406), 1–9. doi:10.1103/PhysRevB.90.235406