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TitleActive 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.
2D Materials
Issue date6-Jun-2015
PublisherAmerican Physical Society
JournalPhysical 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.
AccessOpen access
Appears in Collections:CDF - CEP - Artigos/Papers (with refereeing)

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