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Magnetically-dressed CrSBr exciton-polaritons in ultrastrong coupling regime

Author

Listed:
  • Tingting Wang

    (Peking University
    Collaborative Innovation Center of Quantum Matter)

  • Dingyang Zhang

    (Peking University)

  • Shiqi Yang

    (Peking University
    Peking University)

  • Zhongchong Lin

    (Peking University)

  • Quan Chen

    (South China Normal University)

  • Jinbo Yang

    (Peking University)

  • Qihuang Gong

    (Peking University
    Peking University
    Liaoning Academy of Materials)

  • Zuxin Chen

    (South China Normal University)

  • Yu Ye

    (Peking University
    Collaborative Innovation Center of Quantum Matter
    Peking University
    Liaoning Academy of Materials)

  • Wenjing Liu

    (Peking University
    Peking University
    Shanxi University)

Abstract

Over the past few decades, exciton-polaritons have attracted substantial research interest due to their half-light-half-matter bosonic nature. Coupling exciton-polaritons with magnetic orders grants access to rich many-body phenomena, but has been limited by the availability of material systems that exhibit simultaneous exciton resonances and magnetic ordering. Here we report magnetically-dressed microcavity exciton-polaritons in the van der Waals antiferromagnetic (AFM) semiconductor CrSBr coupled to a Tamm plasmon microcavity. Using angle-resolved spectroscopy, we reveal an exceptionally high exciton-photon coupling strength, up to 169 meV, demonstrating ultrastrong coupling that persists up to room temperature. By performing temperature-dependent spectroscopy, we show the magnetic nature of the exciton-polaritons in CrSBr microcavity as the magnetic order changes from AFM to paramagnetic. By applying an out-of-plane magnetic field, we achieve effective tuning of the polariton energy while maintaining the ultrastrong exciton-photon coupling strength. We attribute this to the spin canting process that modulates the interlayer exciton interaction.

Suggested Citation

  • Tingting Wang & Dingyang Zhang & Shiqi Yang & Zhongchong Lin & Quan Chen & Jinbo Yang & Qihuang Gong & Zuxin Chen & Yu Ye & Wenjing Liu, 2023. "Magnetically-dressed CrSBr exciton-polaritons in ultrastrong coupling regime," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-41688-7
    DOI: 10.1038/s41467-023-41688-7
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    Cited by:

    1. Francesco L. Ruta & Shuai Zhang & Yinming Shao & Samuel L. Moore & Swagata Acharya & Zhiyuan Sun & Siyuan Qiu & Johannes Geurs & Brian S. Y. Kim & Matthew Fu & Daniel G. Chica & Dimitar Pashov & Xiaod, 2023. "Hyperbolic exciton polaritons in a van der Waals magnet," Nature Communications, Nature, vol. 14(1), pages 1-9, December.

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