Investigation of a nonequilibrium polariton condensate in cylindrical micropillars in a strong magnetic field
- Авторы: Brichkin A.S.1, Novikov S.I.1, Chernenko A.V.1, Schneider C.2, Hoefling S.2
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Учреждения:
- Institute of Solid State Physics
- Würzburg University
- Выпуск: Том 124, № 5 (2017)
- Страницы: 751-757
- Раздел: Solids and Liquids
- URL: https://journals.rcsi.science/1063-7761/article/view/192172
- DOI: https://doi.org/10.1134/S1063776117040021
- ID: 192172
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Аннотация
We analyze the photoluminescence of a nonequilibrium polariton condensate in cylindrical micropillars etched on the surface of a high-Q GaAs microcavity in a wide range of detunings in a magnetic field up to 12 T for various levels of nonresonant laser pumping by nanosecond pulses. With such a method of excitation, a considerable effect of the interaction of the reservoir of photoexcited excitons with the condensate on the Zeeman splitting of the polariton condensate levels can be expected, which can lead to a decrease in its value and even to sign reversal. However, the measurements of photoluminescence in a wide range of optical excitation densities show that Zeeman splitting weakly depends on the optical pumping (its variation does not exceed 15% of the splitting in a field of 12 T). The estimation of the exciton density in the reservoir based on these data gives a value lower than 108 cm–2. In addition, a noticeable decrease (by a factor of about 1.8) in the polariton condensation threshold in a magnetic field is detected.
Об авторах
A. Brichkin
Institute of Solid State Physics
Email: chernen@issp.ac.ru
Россия, Chernogolovka, Moscow oblast, 142432
S. Novikov
Institute of Solid State Physics
Email: chernen@issp.ac.ru
Россия, Chernogolovka, Moscow oblast, 142432
A. Chernenko
Institute of Solid State Physics
Автор, ответственный за переписку.
Email: chernen@issp.ac.ru
Россия, Chernogolovka, Moscow oblast, 142432
C. Schneider
Würzburg University
Email: chernen@issp.ac.ru
Германия, Würzburg, D-97074
S. Hoefling
Würzburg University
Email: chernen@issp.ac.ru
Германия, Würzburg, D-97074
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