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Strong-coupling of WSe2 in ultra-compact plasmonic nanocavities at room temperature

Author

Listed:
  • Marie-Elena Kleemann

    (NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge)

  • Rohit Chikkaraddy

    (NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge)

  • Evgeny M. Alexeev

    (University of Sheffield)

  • Dean Kos

    (NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge)

  • Cloudy Carnegie

    (NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge)

  • Will Deacon

    (NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge)

  • Alex Casalis Pury

    (NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge)

  • Christoph Große

    (NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge)

  • Bart Nijs

    (NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge)

  • Jan Mertens

    (NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge)

  • Alexander I. Tartakovskii

    (University of Sheffield)

  • Jeremy J. Baumberg

    (NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge)

Abstract

Strong coupling of monolayer metal dichalcogenide semiconductors with light offers encouraging prospects for realistic exciton devices at room temperature. However, the nature of this coupling depends extremely sensitively on the optical confinement and the orientation of electronic dipoles and fields. Here, we show how plasmon strong coupling can be achieved in compact, robust, and easily assembled gold nano-gap resonators at room temperature. We prove that strong-coupling is impossible with monolayers due to the large exciton coherence size, but resolve clear anti-crossings for greater than 7 layer devices with Rabi splittings exceeding 135 meV. We show that such structures improve on prospects for nonlinear exciton functionalities by at least 104, while retaining quantum efficiencies above 50%, and demonstrate evidence for superlinear light emission.

Suggested Citation

  • Marie-Elena Kleemann & Rohit Chikkaraddy & Evgeny M. Alexeev & Dean Kos & Cloudy Carnegie & Will Deacon & Alex Casalis Pury & Christoph Große & Bart Nijs & Jan Mertens & Alexander I. Tartakovskii & Je, 2017. "Strong-coupling of WSe2 in ultra-compact plasmonic nanocavities at room temperature," Nature Communications, Nature, vol. 8(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01398-3
    DOI: 10.1038/s41467-017-01398-3
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    Cited by:

    1. Shu Hu & Junyang Huang & Rakesh Arul & Ana Sánchez-Iglesias & Yuling Xiong & Luis M. Liz-Marzán & Jeremy J. Baumberg, 2024. "Robust consistent single quantum dot strong coupling in plasmonic nanocavities," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    2. Niclas S. Mueller & Rakesh Arul & Gyeongwon Kang & Ashley P. Saunders & Amalya C. Johnson & Ana Sánchez-Iglesias & Shu Hu & Lukas A. Jakob & Jonathan Bar-David & Bart Nijs & Luis M. Liz-Marzán & Fang , 2023. "Photoluminescence upconversion in monolayer WSe2 activated by plasmonic cavities through resonant excitation of dark excitons," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    3. Tingting Wu & Chongwu Wang & Guangwei Hu & Zhixun Wang & Jiaxin Zhao & Zhe Wang & Ksenia Chaykun & Lin Liu & Mengxiao Chen & Dong Li & Song Zhu & Qihua Xiong & Zexiang Shen & Huajian Gao & Francisco J, 2024. "Ultrastrong exciton-plasmon couplings in WS2 multilayers synthesized with a random multi-singular metasurface at room temperature," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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