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Room-temperature quantum emission from interface excitons in mixed-dimensional heterostructures

Author

Listed:
  • N. Fang

    (RIKEN Cluster for Pioneering Research)

  • Y. R. Chang

    (RIKEN Cluster for Pioneering Research)

  • S. Fujii

    (RIKEN Center for Advanced Photonics
    Keio University)

  • D. Yamashita

    (RIKEN Center for Advanced Photonics
    National Institute of Advanced Industrial Science and Technology (AIST))

  • M. Maruyama

    (University of Tsukuba)

  • Y. Gao

    (University of Tsukuba)

  • C. F. Fong

    (RIKEN Cluster for Pioneering Research)

  • D. Kozawa

    (RIKEN Cluster for Pioneering Research
    RIKEN Center for Advanced Photonics
    National Institute for Materials Science)

  • K. Otsuka

    (RIKEN Cluster for Pioneering Research
    The University of Tokyo)

  • K. Nagashio

    (The University of Tokyo)

  • S. Okada

    (University of Tsukuba)

  • Y. K. Kato

    (RIKEN Cluster for Pioneering Research
    RIKEN Center for Advanced Photonics)

Abstract

The development of van der Waals heterostructures has introduced unconventional phenomena that emerge at atomically precise interfaces. For example, interlayer excitons in two-dimensional transition metal dichalcogenides show intriguing optical properties at low temperatures. Here we report on room-temperature observation of interface excitons in mixed-dimensional heterostructures consisting of two-dimensional tungsten diselenide and one-dimensional carbon nanotubes. Bright emission peaks originating from the interface are identified, spanning a broad energy range within the telecommunication wavelengths. The effect of band alignment is investigated by systematically varying the nanotube bandgap, and we assign the new peaks to interface excitons as they only appear in type-II heterostructures. Room-temperature localization of low-energy interface excitons is indicated by extended lifetimes as well as small excitation saturation powers, and photon correlation measurements confirm antibunching. With mixed-dimensional van der Waals heterostructures where band alignment can be engineered, new opportunities for quantum photonics are envisioned.

Suggested Citation

  • N. Fang & Y. R. Chang & S. Fujii & D. Yamashita & M. Maruyama & Y. Gao & C. F. Fong & D. Kozawa & K. Otsuka & K. Nagashio & S. Okada & Y. K. Kato, 2024. "Room-temperature quantum emission from interface excitons in mixed-dimensional heterostructures," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-47099-6
    DOI: 10.1038/s41467-024-47099-6
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    References listed on IDEAS

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