Wavelength-dependent emission enhancement through the design of active plasmonic nanoantennas
authors Ferrie, M; Pinna, N; Ravaine, S; Vallee, RAL
nationality International
journal OPTICS EXPRESS
keywords SINGLE-MOLECULE FLUORESCENCE; GOLD NANOPARTICLES; QUANTUM DOTS; PARTICLES; FLUOROPHORES; LUMINESCENCE; SURFACES; COLLOIDS; SPHERES; LIGHT
abstract Owing to the competition between the radiative and nonradiative decay channels occurring in plasmonic assemblies, we show here how to conceive a long pass emission filter and actually design it. We report the synthesis of gold@silica nanoparticles grafted with dye molecules. The control of the thickness of the silica shell allows us to tune the distance between the metal core and the dye molecules. Assemblies of small number (1 to 7) of these core-shell (CS) particles, considered as multimers, have also been produced for the first time. We show that the shaping of the emission spectra of the multimers is drastically enhanced by comparison with the corresponding monomers. We also show a strong enhancement of the decay rates at the LSP resonance, dominated by the non-radiative energy tranfer from the active medium to the metal. The decay rates decrease as the detuning between the long wavelength emission and the LSP resonance increases. (C) 2011 Optical Society of America
publisher OPTICAL SOC AMER
issn 1094-4087
year published 2011
volume 19
issue 18
beginning page 17697
ending page 17712
digital object identifier (doi) 10.1364/OE.19.017697
web of science category Optics
subject category Optics
unique article identifier WOS:000294489700105
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journal impact factor 3.669
5 year journal impact factor 3.461
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