Chiral modes at exceptional points in exciton-polariton quantum fluids
Chiral modes at exceptional points in exciton-polariton quantum fluids
We demonstrate generation of chiral modes -- vortex flows with fixed handedness in exciton-polariton quantum fluids. The chiral modes arise in the vicinity of exceptional points (non-Hermitian spectral degeneracies) in an optically-induced resonator for exciton polaritons. In particular, a vortex is generated by driving two dipole modes of the non-Hermitian ring resonator into degeneracy. Transition through the exceptional point in the space of the system's parameters is enabled by precise manipulation of real and imaginary parts of the closed-wall potential forming the resonator. As the system is driven to the vicinity of the exceptional point, we observe the formation of a vortex state with a fixed orbital angular momentum (topological charge). Our method can be extended to generate high-order orbital angular momentum states through coalescence of multiple non-Hermitian spectral degeneracies, which could find application in integrated optoelectronics.
Gao, T.
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Li, Guangyao
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Liew, T.C.H.
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Comber-Todd, D.
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Nalitov, A.
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Steger, M.
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West, K.
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Pfeiffer, L.
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Snoke, D.
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Kavokin, Alexey
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Truscott, A.G.
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Ostrovskaya, E.A.
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Gao, T.
293e9f65-1063-4bc9-b065-72c4076bf0bb
Li, Guangyao
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Liew, T.C.H.
9686367a-ba47-4a78-80b1-35dc2155c75f
Comber-Todd, D.
514bfdb1-7d4a-4752-90f3-f5fa3a66b413
Nalitov, A.
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Steger, M.
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West, K.
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Pfeiffer, L.
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Snoke, D.
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Kavokin, Alexey
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Truscott, A.G.
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Ostrovskaya, E.A.
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Gao, T., Li, Guangyao, Liew, T.C.H., Comber-Todd, D., Nalitov, A., Steger, M., West, K., Pfeiffer, L., Snoke, D., Kavokin, Alexey, Truscott, A.G. and Ostrovskaya, E.A.
(2018)
Chiral modes at exceptional points in exciton-polariton quantum fluids.
Physical Review Letters, 120 (6), [065301].
(doi:10.1103/PhysRevLett.120.065301).
Abstract
We demonstrate generation of chiral modes -- vortex flows with fixed handedness in exciton-polariton quantum fluids. The chiral modes arise in the vicinity of exceptional points (non-Hermitian spectral degeneracies) in an optically-induced resonator for exciton polaritons. In particular, a vortex is generated by driving two dipole modes of the non-Hermitian ring resonator into degeneracy. Transition through the exceptional point in the space of the system's parameters is enabled by precise manipulation of real and imaginary parts of the closed-wall potential forming the resonator. As the system is driven to the vicinity of the exceptional point, we observe the formation of a vortex state with a fixed orbital angular momentum (topological charge). Our method can be extended to generate high-order orbital angular momentum states through coalescence of multiple non-Hermitian spectral degeneracies, which could find application in integrated optoelectronics.
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Accepted/In Press date: 4 January 2017
e-pub ahead of print date: 9 February 2018
Identifiers
Local EPrints ID: 416849
URI: http://eprints.soton.ac.uk/id/eprint/416849
ISSN: 1079-7114
PURE UUID: d34651e6-4fe9-46db-8a41-6905582e7dac
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Date deposited: 11 Jan 2018 17:30
Last modified: 15 Mar 2024 17:45
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Contributors
Author:
T. Gao
Author:
Guangyao Li
Author:
T.C.H. Liew
Author:
D. Comber-Todd
Author:
A. Nalitov
Author:
M. Steger
Author:
K. West
Author:
L. Pfeiffer
Author:
D. Snoke
Author:
A.G. Truscott
Author:
E.A. Ostrovskaya
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