Work

Ultrastrong coupling between molecular vibrations in water and surface lattice resonances

Year: 2024

Type: article

Abstract: We investigate the vibrational ultrastrong coupling between molecular vibrations of water molecules and surface lattice resonances (SLRs) sustained by extended arrays of plasmonic microparticles. We design and fabricate an array of gold bowties, which sustain a very high field enhancement, with its SLR resonated with the OH stretching modes of water. We measure a Rabi splitting of 567 cm-1 in the strongly coupled system, whose coupling strength is 8% of the OH vibrational energy, at the onset of the ultrastrong coupling regime (10%). These results introduce metallic microparticle arrays as a platform for the investigation of ultrastrong coupling, which could be used in polaritonic chemistry to modify the dynamics of chemical reactions that require high coupling strengths.

Source: The Journal of Chemical Physics

DOI: 10.1063/5.0231198

Authors: Francesco Verdelli, Yu-Chen Wei, Joost M. Scheers, Mohamed S. Abdelkhalik, Masoumeh Goudarzi, Jaime Gómez Rivas

Institutions: Dutch Institute for Fundamental Energy Research, Eindhoven University of Technology

Language: English

Topic: Strong Light-Matter Interactions

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,500

Funders: National Science and Technology Council, Nederlandse Organisatie voor Wetenschappelijk Onderzoek, National Science and Technology Council