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arXiv · 2104.00056

Extraordinary fluorescence enhancement in metal-dielectric core-shell nanoparticles

Ilia L. Rasskazov·Alexander Moroz·P. Scott Carney
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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 $\bar F$.

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Ilia L. Rasskazov, Alexander Moroz, P. Scott Carney. 2021-03-31. Extraordinary fluorescence enhancement in metal-dielectric core-shell nanoparticles. https://doi.org/10.1021/acs.jpclett.1c01368

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