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Realization of exciton-polariton condensation in GaAs-based microcavity grown by metalorganic chemical vapor deposition

Daegwang Choi, Min Park, Chan-Young Sung, Hyoungsoon Choi, and Yong-Hoon Cho*

  • Department of Physics and KI for the NanoCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea

  • *yonghcho@kaist.ac.kr
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Phys. Rev. Research 4, 033188 – Published 6 September, 2022

DOI: https://doi.org/10.1103/PhysRevResearch.4.033188

Abstract

Metalorganic chemical vapor deposition (MOCVD) has not been often used for studying exciton-polariton condensation and developing polaritonic devices, although it is a powerful mass productive method for practical applications. Here, we demonstrate that the MOCVD-grown GaAs-based microcavity can realize the nonequilibrium condensation of exciton-polariton. We obtained the Rabi splitting values of 10.1 meV in the angle-resolved reflectance spectrum from the MOCVD-grown microcavity. And, we also measured the angle-resolved photoluminescence depending on pumping power to observe condensation behaviors. Furthermore, we found that the occupancy distributions of polaritons are in a nonequilibrium state by fitting Bose-Einstein distributions. To realize the strong coupling and exciton-polariton condensation, we reduced the linewidth broadening of photoluminescence from quantum wells by optimizing growth conditions and designs.

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Phys. Rev. Research 4, 033188– Published 6 September, 2022
  • Received 28 February 2022
  • Revised 4 August 2022
  • Accepted 9 August 2022
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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