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Proceedings Paper

Analysis of Förster resonance energy transfer (FRET) in the vicinity of a charged metallic nanosphere via nonlocal optical response method
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Paper Abstract

Forster Resonance Energy Transfer (FRET) is a major interparticle energy transfer mechanism used in a wide range of modern-day applications. Hence, enhancing the FRET rate by different mechanisms has been extensively studied in the literature. Obtaining Plasmonic enhanced FRET by placing a metal nanoparticle (MNP) in the vicinity of energy exchanging molecules is one such mechanism. Here we present a model to elucidate the effects of extraneous surface charges present on such a vicinal MNP on the FRET rate considering the nonlocal response of the MNP. This model is based on the well established extended Mie theory of Bohren and Hunt along with the idea of introducing an effective dielectric function for the charged MNP. Our results indicate that the excess surface charges will lead to a blueshift in the resonance frequency and greater enhancements in the FRET rate for both local and nonlocal response based methods. Furthermore, we propose potential substitutes for noble metals that are conventionally used in plasmonic enhanced FRET.

Paper Details

Date Published: 1 April 2020
PDF: 10 pages
Proc. SPIE 11345, Nanophotonics VIII, 113451B (1 April 2020); doi: 10.1117/12.2554147
Show Author Affiliations
Champi Abeywickrama, Monash Univ. (Australia)
Malin Premaratne, Monash Univ. (Australia)
David L. Andrews, Univ. of East Anglia (United Kingdom)

Published in SPIE Proceedings Vol. 11345:
Nanophotonics VIII
David L. Andrews; Angus J. Bain; Martti Kauranen; Jean-Michel Nunzi, Editor(s)

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