Freiburg 2024 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 55: Poster VI

Q 55.41: Poster

Donnerstag, 14. März 2024, 17:00–19:00, Tent B

Fluorescence resonance energy transfer near plasmonic nanostructures — •Shubhadeep Mondal and Markus Lippitz — University of Bayreuth

Fluorescence resonance energy transfer (FRET) plays a key role in photosynthesis, photovoltaics, biosensing, light sources, and more. It describes the nanoscale energy transfer between fluorophores, taking into account the near-field non-radiative dipole-dipole (donor-acceptor) interaction. Our goal is to study the coupling between quantum emitters and the influence of the nanoscale environment on it, for which it is crucial to design a photonic environment to control the FRET rate and efficiency. FRET can be measured by its influence on donor lifetime and acceptor brightness, but the plasmonic environment also modifies both signals by the Purcell effect and fluorescence quenching. We will discuss our experimental setup and data analysis to disentangle these effects.

Keywords: single molecule; fluorescence resonance energy transfer; local density of optical states; nanophotonics; plasmonics