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

Champi Abeywickrama; Malin Premaratne; David L. Andrews

doi:10.1117/12.2554147

1 April 2020 Analysis of Förster resonance energy transfer (FRET) in the vicinity of a charged metallic nanosphere via nonlocal optical response method

Champi Abeywickrama, Malin Premaratne, David L. Andrews

Author Affiliations +

Proceedings Volume 11345, Nanophotonics VIII; 113451B (2020) https://doi.org/10.1117/12.2554147
Event: SPIE Photonics Europe, 2020, Online Only

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.

Conference Presentation

Citation Download Citation

Champi Abeywickrama, Malin Premaratne, and David L. Andrews "Analysis of Förster resonance energy transfer (FRET) in the vicinity of a charged metallic nanosphere via nonlocal optical response method", Proc. SPIE 11345, Nanophotonics VIII, 113451B (1 April 2020); https://doi.org/10.1117/12.2554147

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