Room-temperature quantum nanoplasmonic coherent perfect absorption

Yiming Lai, Daniel D. A. Clarke, Philipp Grimm, Asha Devi, Daniel Wigger, Tobias Helbig, Tobias Hofmann, Ronny Thomale, Jer-Shing Huang, Bert Hecht () and Ortwin Hess ()
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Yiming Lai: Trinity College Dublin
Daniel D. A. Clarke: Trinity College Dublin
Philipp Grimm: University of Würzburg
Asha Devi: Trinity College Dublin
Daniel Wigger: Trinity College Dublin
Tobias Helbig: Julius-Maximilians-Universität Würzburg
Tobias Hofmann: Julius-Maximilians-Universität Würzburg
Ronny Thomale: Julius-Maximilians-Universität Würzburg
Jer-Shing Huang: Leibniz Institute of Photonic Technology
Bert Hecht: University of Würzburg
Ortwin Hess: Trinity College Dublin

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract Light-matter superposition states obtained via strong coupling play a decisive role in quantum information processing, but the deleterious effects of material dissipation and environment-induced decoherence inevitably destroy coherent light-matter polaritons over time. Here, we propose the use of coherent perfect absorption under near-field driving to prepare and protect the polaritonic states of a single quantum emitter interacting with a plasmonic nanocavity at room temperature. Our scheme of quantum nanoplasmonic coherent perfect absorption leverages an inherent frequency specificity to selectively initialize the coupled system in a chosen plasmon-emitter dressed state, while the coherent, unidirectional and non-perturbing near-field energy transfer from a proximal plasmonic waveguide can in principle render the dressed state robust against dynamic dissipation under ambient conditions. Our study establishes a previously unexplored paradigm for quantum state preparation and coherence preservation in plasmonic cavity quantum electrodynamics, offering compelling prospects for elevating quantum nanophotonic technologies to ambient temperatures.

Date: 2024
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DOI: 10.1038/s41467-024-50574-9

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