We demonstrate the strong coupling of a quantum dot and a graphene spherical shell coating it. Our simulations are the exact solutions of 3D Maxwell equations. Interaction produces sharp hybrid modes, even when the two are off-resonant, which are voltage-tunable (continuously) in an 80 meV interval. Despite a voltage-tunable quantum dot, the coupling of the light to these "very sharp" plexcitonic resonances is an order of magnitude larger than its coupling to a quantum dot. Hence, our results are very attractive for sensing applications and graphene display technologies with sharper colors. Moreover, on a simple theoretical model, we explain why such sharp, highly tunable, resonances emerge.
@article{arxiv.1906.04434,
title = {A quantum emitter coated with graphene interacting in the strong coupling regime},
author = {Mehmet Günay and Vasilios Karanikolas and Ramazan Sahin and Rasim Volga Ovali and Alpan Bek and Mehmet Emre Tasgin},
journal= {arXiv preprint arXiv:1906.04434},
year = {2020}
}