Extraordinary Fluorescence Enhancement in Metal-Dielectric Core–Shell Nanoparticles
Ilia L. Rasskazov, Alexander Moroz, P. Scott Carney
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.
Topics & Concepts
DielectricMultipole expansionMaterials scienceFluorescenceMetalShell (structure)Quantum yieldBar (unit)NanoparticleCore (optical fiber)Transverse planeMolecular physicsCondensed matter physicsAtomic physicsOpticsOptoelectronicsNanotechnologyPhysicsComposite materialQuantum mechanicsEngineeringMeteorologyMetallurgyStructural engineeringGold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchAdvanced biosensing and bioanalysis techniques