Investigation of a nonequilibrium polariton condensate in cylindrical micropillars in a strong magnetic field

Journal Article · Mon May 15 04:00:00 EDT 2017 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776117040021· OSTI ID:22756481

Brichkin, A. S.; Novikov, S. I.; Schneider, C.; Hoefling, S. ^[1]

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1. Würzburg University (Germany)

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 10{sup 8} cm{sup –2}. In addition, a noticeable decrease (by a factor of about 1.8) in the polariton condensation threshold in a magnetic field is detected.

• OSTI ID: 22756481
• Journal Information: Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 5 Vol. 124; ISSN JTPHES; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CYLINDRICAL CONFIGURATION
GALLIUM ARSENIDES
MAGNETIC FIELDS
MATHEMATICAL OPERATORS
OPTICAL PUMPING
POLARONS
ZEEMAN EFFECT