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 Andrews

Research output: Contribution to conferencePaper

2 Citations (Scopus)

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.
Original languageEnglish
DOIs
Publication statusPublished - 1 Apr 2020
EventPhotonics Europe: Nanophotonics - Strasbourg, France
Duration: 5 Apr 20209 Apr 2020
Conference number: 11345

Conference

ConferencePhotonics Europe
CountryFrance
CityStrasbourg
Period5/04/209/04/20

Keywords

  • Effective dielectric function
  • Extended mie theory
  • Förster Resonance Energy Transfer
  • Metal nanoparticle
  • Nonlocal response

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