Control of the external photoluminescent quantum yield of emitters coupled to nanoantenna phased arrays

摘要: Optical losses in metals represent the largest limitation to external quantum yield of emitters coupled plasmonic antennas. These can be at emission wavelength, but they more important shorter wavelengths, i.e., excitation wavelength emitters, where conductivity is usually lower. We present accurate measurements absolute photoluminescent a thin layer emitting material deposited over periodic nanoantenna phased array. Emission and absorptance sample are performed using custom-made setup including an integrating sphere variable angle excitation. The reveal strong dependence on which optical field excites sample. Such behavior attributed coupling between far-field illumination near-field mediated by collective resonances supported Numerical simulations confirm that inherent associated with metal greatly reduced selecting optimum illumination, boosts light conversion efficiency layer. This combined experimental numerical characterization from arrays reveals need carefully design achieve maximum yield.