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Buildup dynamics of room-temperature polariton condensation

Fei Chen1, Hang Zhou2, Ziyu Ye1, Song Luo2, Zheng Sun1, Yuanlin Zheng3, Xianfeng Chen3,4, Huailiang Xu1, Hongxing Xu1 et al.

Tim Byrnes5,1,6,7,8, Hui Li1,*, Zhanghai Chen2,11,12,†, and Jian Wu1,9,10,‡

  • 1State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200241, China
  • 2Department of Physics, College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
  • 3State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
  • 4Collaborative Innovation Center of Light Manipulation and Applications, Shandong Normal University, Jinan 250358, China
  • 5Division of Arts and Sciences, New York University Shanghai, 1555 Century Ave, Pudong New District, Shanghai 200122, China
  • 6NYU-ECNU Institute of Physics at NYU Shanghai, 3663 Zhongshan Road North, Shanghai 200062, China
  • 7Department of Physics, New York University, New York, New York 10003, USA
  • 8Center for Quantum and Topological Systems (CQTS), NYUAD Research Institute, New York University Abu Dhabi, United Arab Emirates
  • 9Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
  • 10CAS Center for Excellence in Ultra-intense Laser Science, Shanghai 201800, China
  • 11Wuhan National High Magnetic Field Center, Wuhan 430074, China
  • 12Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, Jiangsu 210093, China

  • *hli@lps.ecnu.edu.cn
  • †zhanghai@xmu.edu.cn
  • ‡jwu@phy.ecnu.edu.cn

Phys. Rev. B 106, L020301 – Published 19 July, 2022

DOI: https://doi.org/10.1103/PhysRevB.106.L020301

Abstract

By using the femtosecond angle-resolved spectroscopic imaging technique, the ultrafast buildup dynamics of room-temperature polariton condensation is explicitly visualized in a ZnO whispering gallery mode microcavity. The buildup time of polariton condensation with respect to the arrival of the femtosecond pump pulse decreases with the increasing pump power and reaches a lower limit of about 4 ps. Simulation results by numerically solving the open-dissipative Gross-Pitaevskii equation coupled to an incoherent reservoir are in quantitative agreement with the experimental observations, showing that the scattering from exciton reservoir to the lower polariton branches and the decay from these branches dominate the buildup process.

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