Extraordinary fluorescence enhancement in metal-dielectric core-shell nanoparticles

Abstract

Contrary to a paradigm of metal-enhanced fluorescence, unusually thick dielectric coatings can be very favorable to achieve extreme values of averaged fluorescence enhancement factor $\bar{F}\gtrsim 3000$ for emitters located on the surface, or in the interior, of the shell of Au@dielectric spherical core-shell particles under realistic conditions, even for the emitters with 100% intrinsic quantum yield. Thick dielectric coatings facilitate high-quality transverse electric (TE) multipole ($\ell =7$) resonances which are shown as the major cause for the reported extraordinary values of $\bar{F}$.

arXiv comment4 pages, 4 figures

References in corpus (8)

• Pushing the Limit of High-Q Mode of a Single Subwavelength Dielectric Nanocavity
• Fundamental limitations in spontaneous emission rate of single-photon sources
• The critical role of shell in enhanced fluorescence of metal-dielectric core-shell nanoparticles
• STRATIFY: a comprehensive and versatile MATLAB code for a multilayered sphere
• Watching a Single Fluorophore Molecule Walk into a Plasmonic Hotspot
• Spectroscopic properties of a two-level atom interacting with a complex spherical nanoshell
• Fano resonances and fluorescence enhancement of a dipole emitter near a plasmonic nanoshell
• Electromagnetic energy in multilayered spherical particles

Cited by in corpus (4)

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• Is there a proper figure of merit for a plasmonic structure involved in metal-enhanced fluorescence?
• Absorption and scattering of light by metal-dielectric nanoeggs