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Polariton Bose–Einstein condensate from a bound state in the continuum

Author

Listed:
  • V. Ardizzone

    (Institute of Nanotechnology
    Università del Salento)

  • F. Riminucci

    (Institute of Nanotechnology
    Università del Salento
    Lawrence Berkeley National Laboratory)

  • S. Zanotti

    (Università di Pavia)

  • A. Gianfrate

    (Institute of Nanotechnology)

  • M. Efthymiou-Tsironi

    (Institute of Nanotechnology
    Università del Salento)

  • D. G. Suàrez-Forero

    (Institute of Nanotechnology
    Università del Salento)

  • F. Todisco

    (Institute of Nanotechnology)

  • M. Giorgi

    (Institute of Nanotechnology)

  • D. Trypogeorgos

    (Institute of Nanotechnology)

  • G. Gigli

    (Institute of Nanotechnology
    Università del Salento)

  • K. Baldwin

    (Princeton University)

  • L. Pfeiffer

    (Princeton University)

  • D. Ballarini

    (Institute of Nanotechnology)

  • H. S. Nguyen

    (Université de Lyon, ECL, INSA Lyon, CNRS, UCBL, CPE Lyon, INL, UMR5270
    Institut Universitaire de France (IUF))

  • D. Gerace

    (Università di Pavia)

  • D. Sanvitto

    (Institute of Nanotechnology)

Abstract

Bound states in the continuum (BICs)1–3 are peculiar topological states that, when realized in a planar photonic crystal lattice, are symmetry-protected from radiating in the far field despite lying within the light cone4. These BICs possess an invariant topological charge given by the winding number of the polarization vectors5, similar to vortices in quantum fluids such as superfluid helium and atomic Bose–Einstein condensates. In spite of several reports of optical BICs in patterned dielectric slabs with evidence of lasing, their potential as topologically protected states with theoretically infinite lifetime has not yet been fully exploited. Here we show non-equilibrium Bose–Einstein condensation of polaritons—hybrid light–matter excitations—occurring in a BIC thanks to its peculiar non-radiative nature, which favours polariton accumulation. The combination of the ultralong BIC lifetime and the tight confinement of the waveguide geometry enables the achievement of an extremely low threshold density for condensation, which is reached not in the dispersion minimum but at a saddle point in reciprocal space. By bridging bosonic condensation and symmetry-protected radiation eigenmodes, we reveal ways of imparting topological properties onto macroscopic quantum states with unexplored dispersion features. Such an observation may open a route towards energy-efficient polariton condensation in cost-effective integrated devices, ultimately suited for the development of hybrid light–matter optical circuits.

Suggested Citation

  • V. Ardizzone & F. Riminucci & S. Zanotti & A. Gianfrate & M. Efthymiou-Tsironi & D. G. Suàrez-Forero & F. Todisco & M. Giorgi & D. Trypogeorgos & G. Gigli & K. Baldwin & L. Pfeiffer & D. Ballarini & H, 2022. "Polariton Bose–Einstein condensate from a bound state in the continuum," Nature, Nature, vol. 605(7910), pages 447-452, May.
  • Handle: RePEc:nat:nature:v:605:y:2022:i:7910:d:10.1038_s41586-022-04583-7
    DOI: 10.1038/s41586-022-04583-7
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    Citations

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    Cited by:

    1. T. Thu Ha Do & Milad Nonahal & Chi Li & Vytautas Valuckas & Hark Hoe Tan & Arseniy I. Kuznetsov & Hai Son Nguyen & Igor Aharonovich & Son Tung Ha, 2024. "Room-temperature strong coupling in a single-photon emitter-metasurface system," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    2. M. Wurdack & T. Yun & M. Katzer & A. G. Truscott & A. Knorr & M. Selig & E. A. Ostrovskaya & E. Estrecho, 2023. "Negative-mass exciton polaritons induced by dissipative light-matter coupling in an atomically thin semiconductor," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    3. Anna Grudinina & Maria Efthymiou-Tsironi & Vincenzo Ardizzone & Fabrizio Riminucci & Milena De Giorgi & Dimitris Trypogeorgos & Kirk Baldwin & Loren Pfeiffer & Dario Ballarini & Daniele Sanvitto & Nin, 2023. "Collective excitations of a bound-in-the-continuum condensate," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    4. Haoyu Qin & Shaohu Chen & Weixuan Zhang & Huizhen Zhang & Ruhao Pan & Junjie Li & Lei Shi & Jian Zi & Xiangdong Zhang, 2024. "Optical moiré bound states in the continuum," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    5. Qi Han & Jun Wang & Shuangshuang Tian & Shen Hu & Xuefeng Wu & Rongxu Bai & Haibin Zhao & David W. Zhang & Qingqing Sun & Li Ji, 2024. "Inorganic perovskite-based active multifunctional integrated photonic devices," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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