Chiral Modes at Exceptional Points in Exciton-Polariton Quantum Fluids

We demonstrate the 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 i...

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Main Authors: Gao, T., Li, G., Estrecho, E., Liew, Timothy Chi Hin, Comber-Todd, D., Nalitov, A., Steger, M., West, K., Pfeiffer, L., Snoke, D. W., Kavokin, A. V., Truscott, A. G., Ostrovskaya, E. A.
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2018
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Online Access:https://hdl.handle.net/10356/88307
http://hdl.handle.net/10220/44589
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-883072023-02-28T19:23:53Z Chiral Modes at Exceptional Points in Exciton-Polariton Quantum Fluids Gao, T. Li, G. Estrecho, E. Liew, Timothy Chi Hin Comber-Todd, D. Nalitov, A. Steger, M. West, K. Pfeiffer, L. Snoke, D. W. Kavokin, A. V. Truscott, A. G. Ostrovskaya, E. A. School of Physical and Mathematical Sciences Exciton Polariton Bose-Einstein Condensates We demonstrate the 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). This method can be extended to generate higher-order orbital angular momentum states through coalescence of multiple non-Hermitian spectral degeneracies. Our Letter demonstrates the possibility of exploiting nontrivial and counterintuitive properties of waves near exceptional points in macroscopic quantum systems. MOE (Min. of Education, S’pore) Published version 2018-03-19T08:30:33Z 2019-12-06T17:00:23Z 2018-03-19T08:30:33Z 2019-12-06T17:00:23Z 2018 Journal Article Gao, T., Li, G., Estrecho, E., Liew, T. C. H., Comber-Todd, D., Nalitov, A., et al. (2018). Chiral Modes at Exceptional Points in Exciton-Polariton Quantum Fluids. Physical Review Letters, 120(6), 065301-. 0031-9007 https://hdl.handle.net/10356/88307 http://hdl.handle.net/10220/44589 10.1103/PhysRevLett.120.065301 en Physical Review Letters © 2018 American Physical Society (APS). This paper was published in Physical Review Letters and is made available as an electronic reprint (preprint) with permission of American Physical Society (APS). The published version is available at: [http://dx.doi.org/10.1103/PhysRevLett.120.065301]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 7 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Exciton Polariton
Bose-Einstein Condensates
spellingShingle Exciton Polariton
Bose-Einstein Condensates
Gao, T.
Li, G.
Estrecho, E.
Liew, Timothy Chi Hin
Comber-Todd, D.
Nalitov, A.
Steger, M.
West, K.
Pfeiffer, L.
Snoke, D. W.
Kavokin, A. V.
Truscott, A. G.
Ostrovskaya, E. A.
Chiral Modes at Exceptional Points in Exciton-Polariton Quantum Fluids
description We demonstrate the 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). This method can be extended to generate higher-order orbital angular momentum states through coalescence of multiple non-Hermitian spectral degeneracies. Our Letter demonstrates the possibility of exploiting nontrivial and counterintuitive properties of waves near exceptional points in macroscopic quantum systems.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Gao, T.
Li, G.
Estrecho, E.
Liew, Timothy Chi Hin
Comber-Todd, D.
Nalitov, A.
Steger, M.
West, K.
Pfeiffer, L.
Snoke, D. W.
Kavokin, A. V.
Truscott, A. G.
Ostrovskaya, E. A.
format Article
author Gao, T.
Li, G.
Estrecho, E.
Liew, Timothy Chi Hin
Comber-Todd, D.
Nalitov, A.
Steger, M.
West, K.
Pfeiffer, L.
Snoke, D. W.
Kavokin, A. V.
Truscott, A. G.
Ostrovskaya, E. A.
author_sort Gao, T.
title Chiral Modes at Exceptional Points in Exciton-Polariton Quantum Fluids
title_short Chiral Modes at Exceptional Points in Exciton-Polariton Quantum Fluids
title_full Chiral Modes at Exceptional Points in Exciton-Polariton Quantum Fluids
title_fullStr Chiral Modes at Exceptional Points in Exciton-Polariton Quantum Fluids
title_full_unstemmed Chiral Modes at Exceptional Points in Exciton-Polariton Quantum Fluids
title_sort chiral modes at exceptional points in exciton-polariton quantum fluids
publishDate 2018
url https://hdl.handle.net/10356/88307
http://hdl.handle.net/10220/44589
_version_ 1759858046026121216