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Non-resonant spin selection methods and polarization control in exciton-polariton condensates

Non-resonant spin selection methods and polarization control in exciton-polariton condensates
Non-resonant spin selection methods and polarization control in exciton-polariton condensates
Bosonic condensates of exciton-polaritons are characterized by a well-defined pseudospin, which makes them attractive for quantum information schemes and spintronic applications, as well as the exploration of synthetic spin-orbit coupling. However, precise polarization control of coherent polariton condensates under nonresonant injection, the most important ingredient for such advanced studies, still remains a core challenge. Here, we address this problem and demonstrate unprecedented control of the pseudospin of an exciton-polariton condensate. The ultrafast stimulated scattering process allows the observation of completely spin-polarized condensates under highly nonresonant, circularly polarized excitation. This conservation of spin population translates, in the case of linearly polarized excitation, into an elliptically polarized emission. The degree of ellipticity can be controlled by varying the exciton-photon detuning and condensate density. Additionally, cavity engineering allows us to generate completely linearly polarized condensates with a deterministically chosen orientation. Our findings are of fundamental importance for the engineering and design of polaritonic devices that harness the spinor degree of freedom, such as chiral lasers, spin switches, and polaritonic topological insulator circuits.
2469-9950
1-6
Klaas, M.
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Egorov, O.A.
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Liew, T.C.H.
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Nalitov, A.
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Marković, V.
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Suchomel, H.
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Harder, T.H.
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Betzold, S.
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Ostrovskaya, E.A.
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Kavokin, A.
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Klembt, S.
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Höfling, S.
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Schneider, C.
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Klaas, M.
c418ef44-ce6c-461c-a04e-f60eb1e5bfd0
Egorov, O.A.
3d61b8fc-0a64-4cdc-ad6f-65442dc56e72
Liew, T.C.H.
293a2372-69e9-4ca4-b616-c8694c9a3812
Nalitov, A.
3bc0fc10-7645-44e3-b8be-ca4114104680
Marković, V.
b454fa00-6263-4bbc-8ee0-99dbc3a862f2
Suchomel, H.
a8b3ca5f-2f7f-42f4-931d-a8e9b359c7f9
Harder, T.H.
cf09ab4f-4f94-4247-98f2-b4d126fc4560
Betzold, S.
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Ostrovskaya, E.A.
267243dd-d3a7-4e0b-b821-1e0c06a5402c
Kavokin, A.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Klembt, S.
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Höfling, S.
2a16646f-d627-42d2-9242-9632f8e93558
Schneider, C.
2537e550-4f1a-43cd-877f-32d60888a673

Klaas, M., Egorov, O.A., Liew, T.C.H., Nalitov, A., Marković, V., Suchomel, H., Harder, T.H., Betzold, S., Ostrovskaya, E.A., Kavokin, A., Klembt, S., Höfling, S. and Schneider, C. (2019) Non-resonant spin selection methods and polarization control in exciton-polariton condensates. Physical Review B, 99 (11), 1-6, [115303]. (doi:10.1103/PhysRevB.99.115303).

Record type: Article

Abstract

Bosonic condensates of exciton-polaritons are characterized by a well-defined pseudospin, which makes them attractive for quantum information schemes and spintronic applications, as well as the exploration of synthetic spin-orbit coupling. However, precise polarization control of coherent polariton condensates under nonresonant injection, the most important ingredient for such advanced studies, still remains a core challenge. Here, we address this problem and demonstrate unprecedented control of the pseudospin of an exciton-polariton condensate. The ultrafast stimulated scattering process allows the observation of completely spin-polarized condensates under highly nonresonant, circularly polarized excitation. This conservation of spin population translates, in the case of linearly polarized excitation, into an elliptically polarized emission. The degree of ellipticity can be controlled by varying the exciton-photon detuning and condensate density. Additionally, cavity engineering allows us to generate completely linearly polarized condensates with a deterministically chosen orientation. Our findings are of fundamental importance for the engineering and design of polaritonic devices that harness the spinor degree of freedom, such as chiral lasers, spin switches, and polaritonic topological insulator circuits.

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Polariton polarization control - Accepted Manuscript
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e-pub ahead of print date: 4 March 2019
Published date: 15 March 2019

Identifiers

Local EPrints ID: 430371
URI: http://eprints.soton.ac.uk/id/eprint/430371
ISSN: 2469-9950
PURE UUID: 969bdef4-a865-4186-b49e-4c30323cc636

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Date deposited: 26 Apr 2019 16:30
Last modified: 10 Sep 2020 16:55

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Contributors

Author: M. Klaas
Author: O.A. Egorov
Author: T.C.H. Liew
Author: A. Nalitov
Author: V. Marković
Author: H. Suchomel
Author: T.H. Harder
Author: S. Betzold
Author: E.A. Ostrovskaya
Author: A. Kavokin
Author: S. Klembt
Author: S. Höfling
Author: C. Schneider

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