Persistent self-induced Larmor precession evidenced through periodic revivals of coherence
Persistent self-induced Larmor precession evidenced through periodic revivals of coherence
Interferometric measurements of an optically trapped exciton-polariton condensate reveal a regime where the condensate pseudo-spin precesses persistently within the driving optical pulse. For a single 20 μs optical pulse, the condensate pseudo-spin undergoes over 105 full precessions with striking frequency stability. The emergence of the precession is traced to polariton nonlinear interactions that give rise to a self-induced out-of-plane magnetic field, which in turn drives the system spin dynamics. The Larmor precession frequency and trajectory are directly influenced by the condensate density, enabling the control of this effect with optical means. Our results accentuate the system's potential for the realization of magnetometry devices and can lead to the emergence of spin-squeezed polariton condensates.
Bose-Einsten condensate, Exciton-Polariton, Microcavity, Polariton, Polariton Condensate, Semiconductor Microcavity polariton
Sigurdsson, Helgi
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Gnusov, Ivan
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Alyatkin, Sergey
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Pickup, Lucinda M
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Gippius, N.A.
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Lagoudakis, Pavlos
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Askitopoulos, Alexis
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4 October 2022
Sigurdsson, Helgi
c6380293-fe97-4fd0-a819-cf35721d4e5d
Gnusov, Ivan
973d41be-2823-4164-9f3e-4332d2818f07
Alyatkin, Sergey
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Pickup, Lucinda M
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Gippius, N.A.
0f2c71e3-5dc7-4dc0-a5c4-4e1631d280c6
Lagoudakis, Pavlos
ea50c228-f006-4edf-8459-60015d961bbf
Askitopoulos, Alexis
f5793606-9831-4b09-a148-7710fbe4d08b
Sigurdsson, Helgi, Gnusov, Ivan, Alyatkin, Sergey, Pickup, Lucinda M, Gippius, N.A., Lagoudakis, Pavlos and Askitopoulos, Alexis
(2022)
Persistent self-induced Larmor precession evidenced through periodic revivals of coherence.
Physical Review Letters, 129 (15), [155301].
(doi:10.1103/PhysRevLett.129.155301).
Abstract
Interferometric measurements of an optically trapped exciton-polariton condensate reveal a regime where the condensate pseudo-spin precesses persistently within the driving optical pulse. For a single 20 μs optical pulse, the condensate pseudo-spin undergoes over 105 full precessions with striking frequency stability. The emergence of the precession is traced to polariton nonlinear interactions that give rise to a self-induced out-of-plane magnetic field, which in turn drives the system spin dynamics. The Larmor precession frequency and trajectory are directly influenced by the condensate density, enabling the control of this effect with optical means. Our results accentuate the system's potential for the realization of magnetometry devices and can lead to the emergence of spin-squeezed polariton condensates.
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Spinor_coherence_revivals
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PhysRevLett.129.155301
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Accepted/In Press date: 22 August 2022
Published date: 4 October 2022
Additional Information:
Funding Information:
A. A. acknowledges stimulating discussions with J. D. Töpfer, N. G. Berloff, and S. Tsintzos. N. A. G. acknowledges support of RSF Project No. 22-12-00351. P. G. L. acknowledges support from UK’s Engineering and Physical Sciences Research Council (Grant No. EP/M025330/1, Hybrid Polaritonics). H. S. acknowledges the Icelandic Research Fund (Rannis), Grant No. 217631-051.
Publisher Copyright:
© 2022 American Physical Society.
Keywords:
Bose-Einsten condensate, Exciton-Polariton, Microcavity, Polariton, Polariton Condensate, Semiconductor Microcavity polariton
Identifiers
Local EPrints ID: 470360
URI: http://eprints.soton.ac.uk/id/eprint/470360
ISSN: 1079-7114
PURE UUID: 3335dea7-a685-4c14-a9ff-ed3075a3a026
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Date deposited: 06 Oct 2022 17:22
Last modified: 16 Mar 2024 22:00
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Contributors
Author:
Ivan Gnusov
Author:
Sergey Alyatkin
Author:
Lucinda M Pickup
Author:
N.A. Gippius
Author:
Pavlos Lagoudakis
Author:
Alexis Askitopoulos
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