Mode-multiplexing deep-strong light-matter coupling.

Autor: Mornhinweg J; Department of Physics, University of Regensburg, 93040, Regensburg, Germany.; Department of Physics, TU Dortmund University, 44227, Dortmund, Germany., Diebel LK; Department of Physics, University of Regensburg, 93040, Regensburg, Germany., Halbhuber M; Department of Physics, University of Regensburg, 93040, Regensburg, Germany., Prager M; Department of Physics, University of Regensburg, 93040, Regensburg, Germany., Riepl J; Department of Physics, University of Regensburg, 93040, Regensburg, Germany., Inzenhofer T; Department of Physics, University of Regensburg, 93040, Regensburg, Germany., Bougeard D; Department of Physics, University of Regensburg, 93040, Regensburg, Germany., Huber R; Department of Physics, University of Regensburg, 93040, Regensburg, Germany. rupert.huber@ur.de., Lange C; Department of Physics, TU Dortmund University, 44227, Dortmund, Germany. christoph.lange@tu-dortmund.de.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Feb 28; Vol. 15 (1), pp. 1847. Date of Electronic Publication: 2024 Feb 28.
DOI: 10.1038/s41467-024-46038-9
Abstrakt: Dressing electronic quantum states with virtual photons creates exotic effects ranging from vacuum-field modified transport to polaritonic chemistry, and squeezing or entanglement of modes. The established paradigm of cavity quantum electrodynamics maximizes the light-matter coupling strength Ω R / ω c , defined as the ratio of the vacuum Rabi frequency and the frequency of light, by resonant interactions. Yet, the finite oscillator strength of a single electronic excitation sets a natural limit to Ω R / ω c . Here, we enter a regime of record-strong light-matter interaction which exploits the cooperative dipole moments of multiple, highly non-resonant magnetoplasmon modes tailored by our metasurface. This creates an ultrabroadband spectrum of 20 polaritons spanning 6 optical octaves, calculated vacuum ground state populations exceeding 1 virtual excitation quantum, and coupling strengths equivalent to Ω R / ω c = 3.19 . The extreme interaction drives strongly subcycle energy exchange between multiple bosonic vacuum modes akin to high-order nonlinearities, and entangles previously orthogonal electronic excitations solely via vacuum fluctuations.
(© 2024. The Author(s).)
Databáze: MEDLINE
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