Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/39311

 Title: Active magneto-optical control of spontaneous emission in graphene Author(s): Kort-Kamp, W. J. M.Amorim, B.Bastos, G.Pinheiro, Felipe A.Rosa, F. S. S.Peres, N. M. R.Farina, C. Keywords: Graphene2D Materials Issue date: 6-Jun-2015 Publisher: American Physical Society Journal: Physical Review B: Condensed Matter and Materials Physics Abstract(s): We investigate the spontaneous emission rate of a two-level quantum emitter near a graphene-coated substrate under the influence of an external magnetic field or strain induced pseudo-magnetic field. We demonstrate that the application of the magnetic field can substantially increase or decrease the decay rate. We show that a suppression as large as 99$\%$ in the Purcell factor is achieved even for moderate magnetic fields. The emitter's lifetime is a discontinuous function of $|{\bf B}|$, which is a direct consequence of the occurrence of discrete Landau levels in graphene. We demonstrate that, in the near-field regime, the magnetic field enables an unprecedented control of the decay pathways into which the photon/polariton can be emitted. Our findings strongly suggest that a magnetic field could act as an efficient agent for on-demand, active control of light-matter interactions in graphene at the quantum level. Type: Article URI: http://hdl.handle.net/1822/39311 DOI: 10.1103/PhysRevB.92.205415 ISSN: 1098-0121 e-ISSN: 1550-235X Peer-Reviewed: yes Access: Open access Appears in Collections: CDF - CEP - Artigos/Papers (with refereeing)

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