Probing Plasmons in Graphene by Resonance Energy Transfer

TL;DR

This paper introduces a new technique to investigate graphene's electronic excitations by observing fluorescence quenching in quantum dots, enabling precise measurement of plasmon dispersion relations through controlled experiments.

Contribution

It presents a novel method using resonance energy transfer to probe graphene plasmons, allowing accurate dispersion relation extraction by tuning experimental parameters.

Findings

Effective probing of graphene plasmons via fluorescence quenching.

Dispersion relations can be accurately determined by adjusting gate voltage and distance.

Method applicable to other electronic excitations in 2D materials.

Abstract

We propose a novel method to probe electronic excitations in graphene by monitoring the fluorescence quenching of a semiconductor quantum dot (or a dye molecule) due to the resonance energy transfer to the graphene sheet. We show how the dispersion relation of plasmons in graphene (as well as of other electronic excitations) can be accurately extracted by controlling the backgate voltage and the distance between quantum dot and graphene.