From weak to strong coupling of localized surface plasmons to guided modes in a luminescent slab

S.R.K. Rodriguez, Y.T. Chen, T.P. Steinbusch, M.A. Verschuuren, A.F. Koenderink, J. Gomez Rivas

Research output: Contribution to journalArticleAcademicpeer-review

25 Citations (Scopus)
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Abstract

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 nontrivial 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 versus weak coupling leads to drastic modifications of radiation patterns without modifying the nanoantennas themselves, thereby representing an unprecedented design strategy for nanoscale light sources.
Original languageEnglish
Pages (from-to)235406-1/9
JournalPhysical Review B
Volume90
Issue number23
DOIs
Publication statusPublished - 2014

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