Quantum emitter interacting with graphene coating in the strong-coupling regime


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Gunay M., Karanikolas V., ŞAHİN R., Ovali R. V. , BEK A. , TAŞGIN M. E.

PHYSICAL REVIEW B, cilt.101, 2020 (SCI İndekslerine Giren Dergi) identifier identifier

Özet

We demonstrate the strong coupling of a quantum dot and a graphene spherical shell coating it. Our simulations are based on solutions of three-dimensional Maxwell equations, using a boundary element method approach. Interaction between the nanostructures produces sharp hybrid modes, even when the two are off-resonant. The coupling of the light to these "very sharp" plexcitonic resonances is an order of magnitude larger than its coupling to a quantum dot, and they are voltage tunable (continuously) in an 80-meV interval. 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 hybrid resonances emerge.