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Vacuum Rabi splitting in a plasmonic cavity at the single quantum emitter limit

Author

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  • Kotni Santhosh

    (Weizmann Institute of Science
    Present address: Hindustan Petroleum Green R&D Center, HPCL, Bangalore 560067, India.)

  • Ora Bitton

    (Weizmann Institute of Science)

  • Lev Chuntonov

    (Schulich Faculty of Chemistry, Technion-Israel Institute of Technology)

  • Gilad Haran

    (Weizmann Institute of Science)

Abstract

The strong interaction of individual quantum emitters with resonant cavities is of fundamental interest for understanding light–matter interactions. Plasmonic cavities hold the promise of attaining the strong coupling regime even under ambient conditions and within subdiffraction volumes. Recent experiments revealed strong coupling between individual plasmonic structures and multiple organic molecules; however, strong coupling at the limit of a single quantum emitter has not been reported so far. Here we demonstrate vacuum Rabi splitting, a manifestation of strong coupling, using silver bowtie plasmonic cavities loaded with semiconductor quantum dots (QDs). A transparency dip is observed in the scattering spectra of individual bowties with one to a few QDs, which are directly counted in their gaps. A coupling rate as high as 120 meV is registered even with a single QD, placing the bowtie-QD constructs close to the strong coupling regime. These observations are verified by polarization-dependent experiments and validated by electromagnetic calculations.

Suggested Citation

  • Kotni Santhosh & Ora Bitton & Lev Chuntonov & Gilad Haran, 2016. "Vacuum Rabi splitting in a plasmonic cavity at the single quantum emitter limit," Nature Communications, Nature, vol. 7(1), pages 1-5, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11823
    DOI: 10.1038/ncomms11823
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    1. Daniel Timmer & Moritz Gittinger & Thomas Quenzel & Sven Stephan & Yu Zhang & Marvin F. Schumacher & Arne Lützen & Martin Silies & Sergei Tretiak & Jin-Hui Zhong & Antonietta De Sio & Christoph Lienau, 2023. "Plasmon mediated coherent population oscillations in molecular aggregates," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    2. 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.
    3. Renming Liu & Ming Geng & Jindong Ai & Xinyi Fan & Zhixiang Liu & Yu-Wei Lu & Yanmin Kuang & Jing-Feng Liu & Lijun Guo & Lin Wu, 2024. "Deterministic positioning and alignment of a single-molecule exciton in plasmonic nanodimer for strong coupling," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    4. 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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