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Quantum interference between dark-excitons and zone-edged acoustic phonons in few-layer WS2

Author

Listed:
  • Qing-Hai Tan

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Nanyang Technological University)

  • Yun-Mei Li

    (Xiamen University)

  • Jia-Min Lai

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Yu-Jia Sun

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Zhe Zhang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Feilong Song

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Cedric Robert

    (University of Toulouse, INSA-CNRS-UPS, LPCNO)

  • Xavier Marie

    (University of Toulouse, INSA-CNRS-UPS, LPCNO)

  • Weibo Gao

    (Nanyang Technological University
    Nanyang Technological University
    National University of Singapore)

  • Ping-Heng Tan

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Jun Zhang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

Abstract

Fano resonance which describes a quantum interference between continuum and discrete states, provides a unique method for studying strongly interacting physics. Here, we report a Fano resonance between dark excitons and zone-edged acoustic phonons in few-layer WS2 by using the resonant Raman technique. The discrete phonons with large momentum at the M-point of the Brillouin zone and the continuum dark exciton states related to the optically forbidden transition at K and Q valleys are coupled by the exciton-phonon interactions. We observe rich Fano resonance behaviors across layers and modes defined by an asymmetry-parameter q: including constructive interference with two mirrored asymmetry Fano peaks (weak coupling, q > 1 and q

Suggested Citation

  • Qing-Hai Tan & Yun-Mei Li & Jia-Min Lai & Yu-Jia Sun & Zhe Zhang & Feilong Song & Cedric Robert & Xavier Marie & Weibo Gao & Ping-Heng Tan & Jun Zhang, 2023. "Quantum interference between dark-excitons and zone-edged acoustic phonons in few-layer WS2," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-022-35714-3
    DOI: 10.1038/s41467-022-35714-3
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    References listed on IDEAS

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    1. Bruno R. Carvalho & Yuanxi Wang & Sandro Mignuzzi & Debdulal Roy & Mauricio Terrones & Cristiano Fantini & Vincent H. Crespi & Leandro M. Malard & Marcos A. Pimenta, 2017. "Intervalley scattering by acoustic phonons in two-dimensional MoS2 revealed by double-resonance Raman spectroscopy," Nature Communications, Nature, vol. 8(1), pages 1-8, April.
    2. Shishu Zhang & Jianqi Huang & Yue Yu & Shanshan Wang & Teng Yang & Zhidong Zhang & Lianming Tong & Jin Zhang, 2022. "Quantum interference directed chiral raman scattering in two-dimensional enantiomers," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    3. Chongyun Jiang & Weigao Xu & Abdullah Rasmita & Zumeng Huang & Ke Li & Qihua Xiong & Wei-bo Gao, 2018. "Microsecond dark-exciton valley polarization memory in two-dimensional heterostructures," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    4. Bo Peng & Şahin Kaya Özdemir & Weijian Chen & Franco Nori & Lan Yang, 2014. "What is and what is not electromagnetically induced transparency in whispering-gallery microcavities," Nature Communications, Nature, vol. 5(1), pages 1-9, December.
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