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Weak lasing in one-dimensional polariton superlattices

Weak lasing in one-dimensional polariton superlattices
Weak lasing in one-dimensional polariton superlattices
Bosons with finite lifetime exhibit condensation and lasing when their influx exceeds the lasing threshold determined by the dissipative losses. In general, different one-particle states decay differently, and the bosons are usually assumed to condense in the state with the longest lifetime. Interaction between the bosons partially neglected by such an assumption can smear the lasing threshold into a threshold domain—a stable lasing many-body state exists within certain intervals of the bosonic influxes. This recently described weak lasing regime is formed by the spontaneously symmetry breaking and phase-locking self-organization of bosonic modes, which results in an essentially many-body state with a stable balance between gains and losses. Here we report, to our knowledge, the first observation of the weak lasing phase in a one-dimensional condensate of exciton–polaritons subject to a periodic potential. Real and reciprocal space photoluminescence images demonstrate that the spatial period of the condensate is twice as large as the period of the underlying periodic potential. These experiments are realized at room temperature in a ZnO microwire deposited on a silicon grating. The period doubling takes place at a critical pumping power, whereas at a lower power polariton emission images have the same periodicity as the grating.
0027-8424
E1516-E1519
Zhang, Long
1f6aac80-9c61-475a-bc48-30647d37c93f
Xie, Wei
f914674b-ec65-446f-b4dc-aab155152bd6
Wang, Jian
010afd88-adf6-442d-8329-64912c031eed
Poddubny, Alexander
8a3603cf-b1cf-4b30-aafd-e73e67cf6352
Lu, Jian
e18e2104-cc9a-4e2c-9e08-f3b20734116f
Wang, Yinglei
78c9b417-d587-4292-935d-6644e6d9cbce
Gu, Jie
fa257ed1-1ab0-41b8-aa6b-abcd6b84fdc8
Liu, Wenhui
9970585e-79ce-42e9-865a-f629e00c7cba
Xu, Dan
e834ca4e-7a76-42c2-aecb-8789fe11ed25
Shen, Xuechu
4596bb28-c03b-4ad3-a859-37ad96c9bfc2
Rubo, Yuri G.
42167d93-2a44-4c5b-83fe-918f89247ff7
Altshuler, Boris L.
1fd69940-4a7c-4f37-8e17-31edf10418e5
Kavokin, Alexey V.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Chen, Zhanghai
0665a653-d503-4ed1-a2c2-4729057623a9
Zhang, Long
1f6aac80-9c61-475a-bc48-30647d37c93f
Xie, Wei
f914674b-ec65-446f-b4dc-aab155152bd6
Wang, Jian
010afd88-adf6-442d-8329-64912c031eed
Poddubny, Alexander
8a3603cf-b1cf-4b30-aafd-e73e67cf6352
Lu, Jian
e18e2104-cc9a-4e2c-9e08-f3b20734116f
Wang, Yinglei
78c9b417-d587-4292-935d-6644e6d9cbce
Gu, Jie
fa257ed1-1ab0-41b8-aa6b-abcd6b84fdc8
Liu, Wenhui
9970585e-79ce-42e9-865a-f629e00c7cba
Xu, Dan
e834ca4e-7a76-42c2-aecb-8789fe11ed25
Shen, Xuechu
4596bb28-c03b-4ad3-a859-37ad96c9bfc2
Rubo, Yuri G.
42167d93-2a44-4c5b-83fe-918f89247ff7
Altshuler, Boris L.
1fd69940-4a7c-4f37-8e17-31edf10418e5
Kavokin, Alexey V.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Chen, Zhanghai
0665a653-d503-4ed1-a2c2-4729057623a9

Zhang, Long, Xie, Wei, Wang, Jian, Poddubny, Alexander, Lu, Jian, Wang, Yinglei, Gu, Jie, Liu, Wenhui, Xu, Dan, Shen, Xuechu, Rubo, Yuri G., Altshuler, Boris L., Kavokin, Alexey V. and Chen, Zhanghai (2015) Weak lasing in one-dimensional polariton superlattices. Proceedings of the National Academy of Sciences, 112 (13), E1516-E1519. (doi:10.1073/pnas.1502666112).

Record type: Article

Abstract

Bosons with finite lifetime exhibit condensation and lasing when their influx exceeds the lasing threshold determined by the dissipative losses. In general, different one-particle states decay differently, and the bosons are usually assumed to condense in the state with the longest lifetime. Interaction between the bosons partially neglected by such an assumption can smear the lasing threshold into a threshold domain—a stable lasing many-body state exists within certain intervals of the bosonic influxes. This recently described weak lasing regime is formed by the spontaneously symmetry breaking and phase-locking self-organization of bosonic modes, which results in an essentially many-body state with a stable balance between gains and losses. Here we report, to our knowledge, the first observation of the weak lasing phase in a one-dimensional condensate of exciton–polaritons subject to a periodic potential. Real and reciprocal space photoluminescence images demonstrate that the spatial period of the condensate is twice as large as the period of the underlying periodic potential. These experiments are realized at room temperature in a ZnO microwire deposited on a silicon grating. The period doubling takes place at a critical pumping power, whereas at a lower power polariton emission images have the same periodicity as the grating.

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Alexey_Weak_lasing_PNAS2-1.pdf - Accepted Manuscript
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Accepted/In Press date: 11 February 2015
e-pub ahead of print date: 18 March 2015
Published date: 31 March 2015
Organisations: Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 401415
URI: http://eprints.soton.ac.uk/id/eprint/401415
ISSN: 0027-8424
PURE UUID: ee6d415d-a743-4b04-8dc0-442d4d48ec9e

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Date deposited: 13 Oct 2016 15:41
Last modified: 09 Dec 2019 19:25

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