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, vol.101, no.16, 2020 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 101 Issue: 16
  • Publication Date: 2020
  • Doi Number: 10.1103/physrevb.101.165412
  • Journal Name: PHYSICAL REVIEW B
  • Journal Indexes: Science Citation Index Expanded, Scopus, Academic Search Premier, Aerospace Database, Compendex, INSPEC, zbMATH

Abstract

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.