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Chiral modes at exceptional points in exciton-polariton quantum fluids

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.
1079-7114
Gao, T.
293e9f65-1063-4bc9-b065-72c4076bf0bb
Li, Guangyao
812e6532-3890-4b72-a53b-824008836a78
Liew, T.C.H.
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Comber-Todd, D.
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Nalitov, A.
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Steger, M.
e8b4ac1f-ce3e-411c-b189-ab7665db5100
West, K.
7e29d428-59dd-4bbd-86ac-f3e2d4856f02
Pfeiffer, L.
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Snoke, D.
89774988-7f7c-4a74-8f72-c7877d12deb6
Kavokin, Alexey
70ffda66-cfab-4365-b2db-c15e4fa1116b
Truscott, A.G.
c1581d47-001e-47ba-ad66-a2d012d3b03b
Ostrovskaya, E.A.
0baee110-4ae5-4742-83b4-8cd60ed94420
Gao, T.
293e9f65-1063-4bc9-b065-72c4076bf0bb
Li, Guangyao
812e6532-3890-4b72-a53b-824008836a78
Liew, T.C.H.
9686367a-ba47-4a78-80b1-35dc2155c75f
Comber-Todd, D.
514bfdb1-7d4a-4752-90f3-f5fa3a66b413
Nalitov, A.
9d5112f1-a770-4ef4-a145-59f394365305
Steger, M.
e8b4ac1f-ce3e-411c-b189-ab7665db5100
West, K.
7e29d428-59dd-4bbd-86ac-f3e2d4856f02
Pfeiffer, L.
5ac7d8f1-ea17-435b-ae63-c48445f62599
Snoke, D.
89774988-7f7c-4a74-8f72-c7877d12deb6
Kavokin, Alexey
70ffda66-cfab-4365-b2db-c15e4fa1116b
Truscott, A.G.
c1581d47-001e-47ba-ad66-a2d012d3b03b
Ostrovskaya, E.A.
0baee110-4ae5-4742-83b4-8cd60ed94420

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).

Record type: Article

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: 21 Nov 2021 10:05

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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: Alexey Kavokin
Author: A.G. Truscott
Author: E.A. Ostrovskaya

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