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Active magneto-optical control of spontaneous emission in graphene

Active magneto-optical control of spontaneous emission in graphene
Active magneto-optical control of spontaneous emission in graphene
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 pseudomagnetic 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 |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.
1550-235X
1-9
Kort-Kamp, W.J.M.
3b1fe14f-76c8-43d6-9ca9-c4076f46c915
Amorim, B.
613bbd6d-5902-4362-b6f1-eb6578ef5e00
Bastos, G.
77560c4f-1422-4096-9840-7086ade194d9
Pinheiro, F.A.
2fb71c2c-1408-45d8-b166-41f0f336891d
Rosa, F.S.S.
4d741e2b-f52d-41ec-96db-c1013d57dcc0
Peres, N.M.R.
1f788c76-f498-4c08-9ab0-13f07b5d2c81
Farina, C.
fa275882-4b3f-4151-94fa-c8b5c6d4c4a9
Kort-Kamp, W.J.M.
3b1fe14f-76c8-43d6-9ca9-c4076f46c915
Amorim, B.
613bbd6d-5902-4362-b6f1-eb6578ef5e00
Bastos, G.
77560c4f-1422-4096-9840-7086ade194d9
Pinheiro, F.A.
2fb71c2c-1408-45d8-b166-41f0f336891d
Rosa, F.S.S.
4d741e2b-f52d-41ec-96db-c1013d57dcc0
Peres, N.M.R.
1f788c76-f498-4c08-9ab0-13f07b5d2c81
Farina, C.
fa275882-4b3f-4151-94fa-c8b5c6d4c4a9

Kort-Kamp, W.J.M., Amorim, B., Bastos, G., Pinheiro, F.A., Rosa, F.S.S., Peres, N.M.R. and Farina, C. (2015) Active magneto-optical control of spontaneous emission in graphene. Physical Review B, 92 (20), 1-9. (doi:10.1103/PhysRevB.92.205415).

Record type: Article

Abstract

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 pseudomagnetic 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 |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.

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More information

Published date: 13 November 2015
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 398333
URI: https://eprints.soton.ac.uk/id/eprint/398333
ISSN: 1550-235X
PURE UUID: abe659f9-54f9-4f2b-8695-fec73499e5f5

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Date deposited: 22 Jul 2016 10:25
Last modified: 14 Nov 2018 17:30

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Contributors

Author: W.J.M. Kort-Kamp
Author: B. Amorim
Author: G. Bastos
Author: F.A. Pinheiro
Author: F.S.S. Rosa
Author: N.M.R. Peres
Author: C. Farina

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