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Title: Optical bistability in electrically driven polariton condensates
Authors: Shelykh, Ivan
Kavokin, A. V.
Schneider, C.
Höfling, S.
Amthor, Matthias
Liew, Timothy Chi Hin
Metzger, C.
Brodbeck, S.
Worschech, L.
Kamp, M.
Keywords: DRNTU::Science::Physics::Atomic physics::Properties of matter and antimatter
Issue Date: 2015
Source: Amthor, M., Liew, T. C. H., Metzger, C., Brodbeck, S., Worschech, L., Kamp, M., et al. (2015). Optical bistability in electrically driven polariton condensates. Physical review B- condensed matter and materials physics, 91(8).
Series/Report no.: Physical review B - condensed matter and materials physics
Abstract: We observe a bistability in an electrically driven polariton condensate, which is manifested by a memory dependent threshold characteristic. In contrast to the polariton bistabilities previously observed in resonantly optically pumped microcavities, our effect occurs under nonresonant electric pumping and is triggered by the current injection scheme. We explain the origin of the bistability by a dependence of the electron-hole tunneling lifetime on the carrier density in the embedded quantum wells. The field screening effect creates a positive feedback loop, which yields the bistable behavior of the condensate. We develop a rate-equation-based model which qualitatively explains the occurrence of the hysteresis under current injection, its reduction with increased magnetic field, and the absence of bistability under optical pumping.
DOI: 10.1103/PhysRevB.91.081404
Schools: School of Physical and Mathematical Sciences 
Rights: © 2015 American Physical Society. This paper was published in Physical Review B - Condensed Matter and Materials Physics and is made available as an electronic reprint (preprint) with permission of American Physical Society. The paper can be found at the following official DOI: [].  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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