Non-Hermitian topological exciton-polariton corner modes
We theoretically study two-dimensional exciton-polariton lattices and predict that non-Hermitian topological corner modes can be formed under non-resonant pumping. As a generalization of the non-Hermitian skin effect, all eigenstates are localized at the two corners in our model. This is also a h...
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sg-ntu-dr.10356-1708012023-10-16T15:35:53Z Non-Hermitian topological exciton-polariton corner modes Xu, Xingran Bao, Ruiqi Liew, Timothy C. H. School of Physical and Mathematical Sciences Science::Physics Exciton-Polariton Nonresonant Pumping We theoretically study two-dimensional exciton-polariton lattices and predict that non-Hermitian topological corner modes can be formed under non-resonant pumping. As a generalization of the non-Hermitian skin effect, all eigenstates are localized at the two corners in our model. This is also a higher dimensional topology compared to other proposals in exciton-polariton systems and we find that it allows propagating signals in the bulk of the system to travel around defects, which is not possible in one-dimensional topological lattices or two-dimensional lattices with Hermitian edge states. Furthermore, as all polariton states are localized away from an excitation spot, the system offers an opportunity for more accurate measurement of the polariton-polariton interaction strength as the pump-induced exciton-reservoir is spatially separated from all polariton states. Ministry of Education (MOE) Published version This work was supported by the Singaporean Ministry of Education, via the Tier 2 Academic Research Fund Project No. MOE2019-T2-1-004 2023-10-10T06:28:58Z 2023-10-10T06:28:58Z 2022 Journal Article Xu, X., Bao, R. & Liew, T. C. H. (2022). Non-Hermitian topological exciton-polariton corner modes. Physical Review B, 106(20), 201302-. https://dx.doi.org/10.1103/PhysRevB.106.L201302 1098-0121 https://hdl.handle.net/10356/170801 10.1103/PhysRevB.106.L201302 2-s2.0-85142097847 20 106 201302 en MOE2019-T2-1-004 Physical Review B © 2022 American Physical Society. All rights reserved. This article may be downloaded for personal use only. Any other use requires prior permission of the copyright holder. The Version of Record is available online at http://doi.org/10.1103/PhysRevB.106.L201302 application/pdf |
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Science::Physics Exciton-Polariton Nonresonant Pumping Xu, Xingran Bao, Ruiqi Liew, Timothy C. H. Non-Hermitian topological exciton-polariton corner modes |
description |
We theoretically study two-dimensional exciton-polariton lattices and predict
that non-Hermitian topological corner modes can be formed under non-resonant
pumping. As a generalization of the non-Hermitian skin effect, all eigenstates
are localized at the two corners in our model. This is also a higher
dimensional topology compared to other proposals in exciton-polariton systems
and we find that it allows propagating signals in the bulk of the system to
travel around defects, which is not possible in one-dimensional topological
lattices or two-dimensional lattices with Hermitian edge states. Furthermore,
as all polariton states are localized away from an excitation spot, the system
offers an opportunity for more accurate measurement of the polariton-polariton
interaction strength as the pump-induced exciton-reservoir is spatially
separated from all polariton states. |
author2 |
School of Physical and Mathematical Sciences |
author_facet |
School of Physical and Mathematical Sciences Xu, Xingran Bao, Ruiqi Liew, Timothy C. H. |
format |
Article |
author |
Xu, Xingran Bao, Ruiqi Liew, Timothy C. H. |
author_sort |
Xu, Xingran |
title |
Non-Hermitian topological exciton-polariton corner modes |
title_short |
Non-Hermitian topological exciton-polariton corner modes |
title_full |
Non-Hermitian topological exciton-polariton corner modes |
title_fullStr |
Non-Hermitian topological exciton-polariton corner modes |
title_full_unstemmed |
Non-Hermitian topological exciton-polariton corner modes |
title_sort |
non-hermitian topological exciton-polariton corner modes |
publishDate |
2023 |
url |
https://hdl.handle.net/10356/170801 |
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1781793752265785344 |