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Spatial coherence of room-temperature monolayer WSe2 exciton-polaritons in a trap

Author

Listed:
  • Hangyong Shan

    (Carl von Ossietzky University)

  • Lukas Lackner

    (Carl von Ossietzky University)

  • Bo Han

    (Carl von Ossietzky University)

  • Evgeny Sedov

    (Westlake University
    Westlake Institute for Advanced Study
    Vladimir State University named after A. G. and N. G. Stoletovs)

  • Christoph Rupprecht

    (Universität Würzburg)

  • Heiko Knopf

    (Friedrich Schiller University
    Fraunhofer-Institute for Applied Optics and Precision Engineering IOF
    Max Planck School of Photonics)

  • Falk Eilenberger

    (Friedrich Schiller University
    Fraunhofer-Institute for Applied Optics and Precision Engineering IOF
    Max Planck School of Photonics)

  • Johannes Beierlein

    (Universität Würzburg)

  • Nils Kunte

    (Carl von Ossietzky University)

  • Martin Esmann

    (Carl von Ossietzky University)

  • Kentaro Yumigeta

    (Arizona State University)

  • Kenji Watanabe

    (National Institute for Materials Science)

  • Takashi Taniguchi

    (National Institute for Materials Science)

  • Sebastian Klembt

    (Universität Würzburg)

  • Sven Höfling

    (Universität Würzburg)

  • Alexey V. Kavokin

    (Westlake University
    Westlake Institute for Advanced Study
    Physics and Astronomy, University of Southampton)

  • Sefaattin Tongay

    (Arizona State University)

  • Christian Schneider

    (Carl von Ossietzky University)

  • Carlos Antón-Solanas

    (Carl von Ossietzky University)

Abstract

The emergence of spatial and temporal coherence of light emitted from solid-state systems is a fundamental phenomenon intrinsically aligned with the control of light-matter coupling. It is canonical for laser oscillation, emerges in the superradiance of collective emitters, and has been investigated in bosonic condensates of thermalized light, as well as exciton-polaritons. Our room temperature experiments show the strong light-matter coupling between microcavity photons and excitons in atomically thin WSe2. We evidence the density-dependent expansion of spatial and temporal coherence of the emitted light from the spatially confined system ground-state, which is accompanied by a threshold-like response of the emitted light intensity. Additionally, valley-physics is manifested in the presence of an external magnetic field, which allows us to manipulate K and K’ polaritons via the valley-Zeeman-effect. Our findings validate the potential of atomically thin crystals as versatile components of coherent light-sources, and in valleytronic applications at room temperature.

Suggested Citation

  • Hangyong Shan & Lukas Lackner & Bo Han & Evgeny Sedov & Christoph Rupprecht & Heiko Knopf & Falk Eilenberger & Johannes Beierlein & Nils Kunte & Martin Esmann & Kentaro Yumigeta & Kenji Watanabe & Tak, 2021. "Spatial coherence of room-temperature monolayer WSe2 exciton-polaritons in a trap," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-26715-9
    DOI: 10.1038/s41467-021-26715-9
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    1. Jiaxin Zhao & Antonio Fieramosca & Kevin Dini & Ruiqi Bao & Wei Du & Rui Su & Yuan Luo & Weijie Zhao & Daniele Sanvitto & Timothy C. H. Liew & Qihua Xiong, 2023. "Exciton polariton interactions in Van der Waals superlattices at room temperature," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    2. Ermin Malic & Raül Perea-Causin & Roberto Rosati & Daniel Erkensten & Samuel Brem, 2023. "Exciton transport in atomically thin semiconductors," Nature Communications, Nature, vol. 14(1), pages 1-4, December.
    3. Hangyong Shan & Ivan Iorsh & Bo Han & Christoph Rupprecht & Heiko Knopf & Falk Eilenberger & Martin Esmann & Kentaro Yumigeta & Kenji Watanabe & Takashi Taniguchi & Sebastian Klembt & Sven Höfling & S, 2022. "Brightening of a dark monolayer semiconductor via strong light-matter coupling in a cavity," Nature Communications, Nature, vol. 13(1), pages 1-7, December.

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