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Strong coupling and induced transparency at room temperature with single quantum dots and gap plasmons

Author

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  • Haixu Leng

    (UMBC (University of Maryland, Baltimore County))

  • Brian Szychowski

    (UMBC (University of Maryland, Baltimore County))

  • Marie-Christine Daniel

    (UMBC (University of Maryland, Baltimore County))

  • Matthew Pelton

    (UMBC (University of Maryland, Baltimore County))

Abstract

Coherent coupling between plasmons and transition dipole moments in emitters can lead to two distinct spectral effects: vacuum Rabi splitting at strong coupling strengths, and induced transparency (also known as Fano interference) at intermediate coupling strengths. Achieving either strong or intermediate coupling between a single emitter and a localized plasmon resonance has the potential to enable single-photon nonlinearities and other extreme light–matter interactions, at room temperature and on the nanometer scale. Both effects produce two peaks in the spectrum of scattering from the plasmon resonance, and can thus be confused if scattering measurements alone are performed. Here we report measurements of scattering and photoluminescence from individual coupled plasmon–emitter systems that consist of a single colloidal quantum dot in the gap between a gold nanoparticle and a silver film. The measurements unambiguously demonstrate weak coupling (the Purcell effect), intermediate coupling (Fano interference), and strong coupling (Rabi splitting) at room temperature.

Suggested Citation

  • Haixu Leng & Brian Szychowski & Marie-Christine Daniel & Matthew Pelton, 2018. "Strong coupling and induced transparency at room temperature with single quantum dots and gap plasmons," Nature Communications, Nature, vol. 9(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06450-4
    DOI: 10.1038/s41467-018-06450-4
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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. 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.
    3. Hong Zhou & Zhihao Ren & Dongxiao Li & Cheng Xu & Xiaojing Mu & Chengkuo Lee, 2023. "Dynamic construction of refractive index-dependent vibrations using surface plasmon-phonon polaritons," Nature Communications, Nature, vol. 14(1), pages 1-12, 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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