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Published on: March 2, 2016
Extraordinary Fluorescence Enhancement in Metal-Dielectric Core-Shell Nanoparticles
Ilia L Rasskazov1, Alexander Moroz2, P Scott Carney1
1The Institute of Optics, University of Rochester, Rochester, New York 14627, United States.
Abstract:
We show that in metal-dielectric core-shell nanoparticles, unusually thick dielectric coatings can produce extreme fluorescence enhancement with an enhancement factor F̅ ≳ 3000 for emitters located on the surface or in the interior of the shell of Au@dielectric spherical particles under realistic conditions, even for the emitters with 100% intrinsic quantum yield. Thick dielectric coatings facilitate high-quality transverse electric (TE) multipole (l = 7) resonances which are shown as the major cause for the reported extraordinary values of F̅.
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