Nonreciprocal transport of exciton polaritons in a non-hermitian chain
We consider theoretically the dynamics of exciton-polaritons in a zigzag chain of coupled elliptical micropillars subjected to incoherent excitation. The driven-dissipative nature of the system along with the naturally present polarization splitting inside the pillars gives rise to the non-recipr...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/143748 |
| _version_ | 1826121401470287872 |
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| author | Mandal, Subhaskar Banerjee, Rimi Ostrovskaya, Elena A. Liew, Timothy Chi Hin |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Mandal, Subhaskar Banerjee, Rimi Ostrovskaya, Elena A. Liew, Timothy Chi Hin |
| author_sort | Mandal, Subhaskar |
| collection | NTU |
| description | We consider theoretically the dynamics of exciton-polaritons in a zigzag
chain of coupled elliptical micropillars subjected to incoherent excitation.
The driven-dissipative nature of the system along with the naturally present
polarization splitting inside the pillars gives rise to the non-reciprocal
dynamics, which eventually leads to the non-Hermitian skin effect, where all
the modes of the system collapse to one edge. As a result the polaritons
propagate only in one direction along the chain, independent of the excitation
position, and the propagation in the opposite direction is suppressed. The
system shows fair robustness against the typical disorder present in modern
samples. Finally, using the bistable nature of the polaritons we show that
information encoded in the bistability can be transferred only one way. This
paves the way for compact and robust feedback-free one dimensional polariton
transmission channels without the need for external magnetic field, which are
compatible with proposals for polaritonic circuits. |
| first_indexed | 2024-10-01T05:31:43Z |
| format | Journal Article |
| id | ntu-10356/143748 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:31:43Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1437482023-02-28T19:50:50Z Nonreciprocal transport of exciton polaritons in a non-hermitian chain Mandal, Subhaskar Banerjee, Rimi Ostrovskaya, Elena A. Liew, Timothy Chi Hin School of Physical and Mathematical Sciences Science::Physics Nonreciprocal Topological Skin Effect We consider theoretically the dynamics of exciton-polaritons in a zigzag chain of coupled elliptical micropillars subjected to incoherent excitation. The driven-dissipative nature of the system along with the naturally present polarization splitting inside the pillars gives rise to the non-reciprocal dynamics, which eventually leads to the non-Hermitian skin effect, where all the modes of the system collapse to one edge. As a result the polaritons propagate only in one direction along the chain, independent of the excitation position, and the propagation in the opposite direction is suppressed. The system shows fair robustness against the typical disorder present in modern samples. Finally, using the bistable nature of the polaritons we show that information encoded in the bistability can be transferred only one way. This paves the way for compact and robust feedback-free one dimensional polariton transmission channels without the need for external magnetic field, which are compatible with proposals for polaritonic circuits. Ministry of Education (MOE) Published version The work was supported by the Ministry of Education, Singapore (Grant No. MOE2019-T2-1-004) and the Australian Research Council (ARC). T.L. thanks E.Z. Tan for discussions. 2020-09-22T01:47:05Z 2020-09-22T01:47:05Z 2020 Journal Article Mandal, S., Banerjee, R., Ostrovskaya, E. A., & Liew, T. C. H. (2020). Nonreciprocal transport of exciton polaritons in a non-hermitian chain. Physical Review Letters, 125(12), 123902-123908. doi:10.1103/PhysRevLett.125.123902 1079-7114 https://hdl.handle.net/10356/143748 10.1103/PhysRevLett.125.123902 12 125 123902 123908 en MOE2019-T2-1-004 Physical Review Letters © 2020 American Physical Society (APS). All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society (APS). application/pdf |
| spellingShingle | Science::Physics Nonreciprocal Topological Skin Effect Mandal, Subhaskar Banerjee, Rimi Ostrovskaya, Elena A. Liew, Timothy Chi Hin Nonreciprocal transport of exciton polaritons in a non-hermitian chain |
| title | Nonreciprocal transport of exciton polaritons in a non-hermitian chain |
| title_full | Nonreciprocal transport of exciton polaritons in a non-hermitian chain |
| title_fullStr | Nonreciprocal transport of exciton polaritons in a non-hermitian chain |
| title_full_unstemmed | Nonreciprocal transport of exciton polaritons in a non-hermitian chain |
| title_short | Nonreciprocal transport of exciton polaritons in a non-hermitian chain |
| title_sort | nonreciprocal transport of exciton polaritons in a non hermitian chain |
| topic | Science::Physics Nonreciprocal Topological Skin Effect |
| url | https://hdl.handle.net/10356/143748 |
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