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Ultrafast intermode parametric scattering dynamics in room-temperature polariton condensates

Ziyu Ye1,*, Fei Chen1,*, Hang Zhou2, Song Luo2, Zhenrong Sun1, Huailiang Xu1, Hongxing Xu1, Hui Li1,†, Zhanghai Chen2,‡ et al.

Jian Wu1,3,4,5,§

  • 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
  • 3Chongqing Key Laboratory of Precision Optics, Chongqing Institute of East China Normal University, Chongqing 401121, China
  • 4Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
  • 5CAS Center for Excellence in Ultra-intense Laser Science, Shanghai 201800, China

  • *These authors contributed equally to this work.
  • †hli@lps.ecnu.edu.cn
  • ‡zhanghai@xmu.edu.cn
  • §jwu@phy.ecnu.edu.cn

Phys. Rev. B 107, L060303 – Published 10 February, 2023

DOI: https://doi.org/10.1103/PhysRevB.107.L060303

Abstract

Parametric scattering dynamics are general and of crucial importance for cavity exciton polaritons. Here, parametric scattering process driven by exciton polariton condensates has been revealed in a 1D ZnO microcavity between the whispering-gallery mode and quasiwhispering-gallery mode. When the occupation of the produced polariton condensate is dense enough, polariton condensates formed on quasiwhispering-gallery mode can be scattered towards the ground state of the adjacent whispering-gallery modes at higher and lower energies. By using the femtosecond angle-resolved spectroscopic imaging technique, the ultrafast dynamics of this intermode polariton parametric scattering have been explicitly observed. The scattering towards a higher mode occurs faster than that to a lower-energy mode by less than a picosecond. The revealed dynamics can not only expand the present investigations on polariton parametric scattering, but also promote the potential applications in, e.g., quantum information processing.

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