Hybrid architectures for terahertz molecular polaritonics

Ahmed Jaber, Michael Reitz, Avinash Singh, Ali Maleki, Yongbao Xin, Brian T. Sullivan, Ksenia Dolgaleva, Robert W. Boyd, Claudiu Genes () and Jean-Michel Ménard ()
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Ahmed Jaber: University of Ottawa
Michael Reitz: Max Planck Centre for Extreme and Quantum Photonics
Avinash Singh: University of Ottawa
Ali Maleki: University of Ottawa
Yongbao Xin: Iridian Spectral Technologies Ltd.
Brian T. Sullivan: Iridian Spectral Technologies Ltd.
Ksenia Dolgaleva: University of Ottawa
Robert W. Boyd: University of Ottawa
Claudiu Genes: Max Planck Centre for Extreme and Quantum Photonics
Jean-Michel Ménard: University of Ottawa

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

Abstract: Abstract Atoms and their different arrangements into molecules are nature’s building blocks. In a regime of strong coupling, matter hybridizes with light to modify physical and chemical properties, hence creating new building blocks that can be used for avant-garde technologies. However, this regime relies on the strong confinement of the optical field, which is technically challenging to achieve, especially at terahertz frequencies in the far-infrared region. Here we demonstrate several schemes of electromagnetic field confinement aimed at facilitating the collective coupling of a localized terahertz photonic mode to molecular vibrations. We observe an enhanced vacuum Rabi splitting of 200 GHz from a hybrid cavity architecture consisting of a plasmonic metasurface, coupled to glucose, and interfaced with a planar mirror. This enhanced light-matter interaction is found to emerge from the modified intracavity field of the cavity, leading to an enhanced zero-point electric field amplitude. Our study provides key insight into the design of polaritonic platforms with organic molecules to harvest the unique properties of hybrid light-matter states.

Date: 2024
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DOI: 10.1038/s41467-024-48764-6

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