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Resonant intersubband polariton-LO phonon scattering in an optically pumped polaritonic device

Resonant intersubband polariton-LO phonon scattering in an optically pumped polaritonic device
Resonant intersubband polariton-LO phonon scattering in an optically pumped polaritonic device
We report experimental evidence of longitudinal optical (LO) phonon-intersubband polariton scattering processes under resonant injection of light. The scattering process is resonant with both the initial (upper polariton) and final (lower polariton) states and is induced by the interaction of confined electrons with longitudinal optical phonons. The system is optically pumped with a mid-IR laser tuned between 1094 cm−1 and 1134 cm−1 (λ = 9.14 μm and λ = 8.82 μm). The demonstration is provided for both GaAs/AlGaAs and InGaAs/AlInAs doped quantum well systems whose intersubband plasmon lies at a wavelength of ≈10 μm. In addition to elucidating the microscopic mechanism of the polariton-phonon scattering, it is found to differ substantially from the standard single particle electron-LO phonon scattering mechanism, and this work constitutes an important step towards the hopefully forthcoming demonstration of an intersubband polariton laser.
0003-6951
Manceau, J.-M.
89bcd396-84b3-44c0-b543-38e53adbd309
Tran, N.L.
87d0ff1c-3ab9-4e20-bc6c-bef8bbd746ee
Biasol, G.
5d657c3f-f146-4b87-9b17-555fe68e06b0
Laurent, T.
864483c5-e012-4cfc-8996-b40492ffecd3
Sagnes, I.
2c96ab5e-82b6-4f52-9f1a-1c71f4bd798e
Beaudoin, G.
d536fa14-6bb2-4619-9a7d-08770bb0bd4d
De Liberato, S.
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Carusotto, I.
2205328f-fe28-4720-9283-c72e08e35800
Colombelli, R.
6d99ad70-6c9e-4c81-9b9a-260868bae6b7
Manceau, J.-M.
89bcd396-84b3-44c0-b543-38e53adbd309
Tran, N.L.
87d0ff1c-3ab9-4e20-bc6c-bef8bbd746ee
Biasol, G.
5d657c3f-f146-4b87-9b17-555fe68e06b0
Laurent, T.
864483c5-e012-4cfc-8996-b40492ffecd3
Sagnes, I.
2c96ab5e-82b6-4f52-9f1a-1c71f4bd798e
Beaudoin, G.
d536fa14-6bb2-4619-9a7d-08770bb0bd4d
De Liberato, S.
5942e45f-3115-4027-8653-a82667ed8473
Carusotto, I.
2205328f-fe28-4720-9283-c72e08e35800
Colombelli, R.
6d99ad70-6c9e-4c81-9b9a-260868bae6b7

Manceau, J.-M., Tran, N.L., Biasol, G., Laurent, T., Sagnes, I., Beaudoin, G., De Liberato, S., Carusotto, I. and Colombelli, R. (2018) Resonant intersubband polariton-LO phonon scattering in an optically pumped polaritonic device. Applied Physics Letters, 112, [191106]. (doi:10.1063/1.5029893).

Record type: Article

Abstract

We report experimental evidence of longitudinal optical (LO) phonon-intersubband polariton scattering processes under resonant injection of light. The scattering process is resonant with both the initial (upper polariton) and final (lower polariton) states and is induced by the interaction of confined electrons with longitudinal optical phonons. The system is optically pumped with a mid-IR laser tuned between 1094 cm−1 and 1134 cm−1 (λ = 9.14 μm and λ = 8.82 μm). The demonstration is provided for both GaAs/AlGaAs and InGaAs/AlInAs doped quantum well systems whose intersubband plasmon lies at a wavelength of ≈10 μm. In addition to elucidating the microscopic mechanism of the polariton-phonon scattering, it is found to differ substantially from the standard single particle electron-LO phonon scattering mechanism, and this work constitutes an important step towards the hopefully forthcoming demonstration of an intersubband polariton laser.

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APL_LO_paper - Accepted Manuscript
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Accepted/In Press date: 19 April 2018
e-pub ahead of print date: 11 May 2018

Identifiers

Local EPrints ID: 420443
URI: http://eprints.soton.ac.uk/id/eprint/420443
ISSN: 0003-6951
PURE UUID: c97471d9-9bf4-4ee2-8f62-f1eb64810a0e
ORCID for S. De Liberato: ORCID iD orcid.org/0000-0002-4851-2633

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Date deposited: 08 May 2018 16:30
Last modified: 07 Oct 2020 05:05

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Contributors

Author: J.-M. Manceau
Author: N.L. Tran
Author: G. Biasol
Author: T. Laurent
Author: I. Sagnes
Author: G. Beaudoin
Author: S. De Liberato ORCID iD
Author: I. Carusotto
Author: R. Colombelli

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