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

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 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.

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Cited by in corpus (4)

• General point dipole theory for periodic metasurfaces: magnetoelectric scattering lattices coupled to planar photonic structures
• Fano interference for tailoring near-field radiative heat transfer
• Strong coupling between weakly guided semiconductor nanowire modes and an organic dye
• Description of ultrastrong light-matter interaction through coupled harmonic oscillator models and their connection with cavity-QED Hamiltonians