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Crossover from photon to exciton-polariton lasing

Crossover from photon to exciton-polariton lasing
Crossover from photon to exciton-polariton lasing
We report on a real-time observation of the crossover between photon and exciton-polariton lasing in a semiconductor microcavity. Both lasing phases are observed at different times after a high-power excitation pulse. Energy-, time- and angle-resolved measurements allow for the transient characterization of carrier distribution and effective temperature. We find signatures of Bose–Einstein condensation, namely macroscoping occupation of the ground state and narrowing of the linewidth in both lasing regimes. The Bernard–Douraffourgh condition for inversion was tested and the polariton laser as well as the photon laser under continuous wave excitation were found to operate at estimated densities below the theoretically predicted inversion threshold.
1367-2630
Kammann, Elena
75670efa-0611-41ef-ae6c-8e3da851c5dc
Ohadi, Hamid
08639b57-7cae-498a-afd2-dbfd5d738cd2
Maragkou, Maria
b5dfa252-5926-4870-b444-581272470414
Kavokin, Alexey V.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Lagoudakis, Pavlos G.
ea50c228-f006-4edf-8459-60015d961bbf
Kammann, Elena
75670efa-0611-41ef-ae6c-8e3da851c5dc
Ohadi, Hamid
08639b57-7cae-498a-afd2-dbfd5d738cd2
Maragkou, Maria
b5dfa252-5926-4870-b444-581272470414
Kavokin, Alexey V.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Lagoudakis, Pavlos G.
ea50c228-f006-4edf-8459-60015d961bbf

Kammann, Elena, Ohadi, Hamid, Maragkou, Maria, Kavokin, Alexey V. and Lagoudakis, Pavlos G. (2012) Crossover from photon to exciton-polariton lasing. New Journal of Physics, 14, [105003]. (doi:10.1088/1367-2630/14/10/105003).

Record type: Article

Abstract

We report on a real-time observation of the crossover between photon and exciton-polariton lasing in a semiconductor microcavity. Both lasing phases are observed at different times after a high-power excitation pulse. Energy-, time- and angle-resolved measurements allow for the transient characterization of carrier distribution and effective temperature. We find signatures of Bose–Einstein condensation, namely macroscoping occupation of the ground state and narrowing of the linewidth in both lasing regimes. The Bernard–Douraffourgh condition for inversion was tested and the polariton laser as well as the photon laser under continuous wave excitation were found to operate at estimated densities below the theoretically predicted inversion threshold.

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Published date: 2 October 2012

Identifiers

Local EPrints ID: 430548
URI: http://eprints.soton.ac.uk/id/eprint/430548
ISSN: 1367-2630
PURE UUID: d30209c8-21dc-4777-9fbf-d37db353803a

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Date deposited: 03 May 2019 16:30
Last modified: 03 May 2019 16:30

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Contributors

Author: Elena Kammann
Author: Hamid Ohadi
Author: Maria Maragkou

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