biostudies-literatureBiswas SKNIBIB NIH HHS2937-2949https://www.ebi.ac.uk/biostudies/studies/S-EPMC11245121biostudies-literatureUnknown13(16)Thanks to their giant, yet tunable, <i>Q</i>-factor resonances, all-dielectric metasurfaces supporting the quasi-bound states in the continuum (q-BIC) resonances are well-suited to provide a promising platform for quantum-coherent light-matter interactions. Yet, the strong coupling regime, characterized by the hybrid light-matter states - polaritons, has not yet been fully explored in the mid-infrared regime. This paper investigates the parameter space of vibrational strong coupling (VSC) between material and metasurface cavities supporting q-BIC resonances in the mid-infrared spectral range. We outline the effects of transition dipole strength, damping rate, and the number of molecules coupled to a single cavity, as well as the cavity damping rates, to understand their respective impacts Nanophotonics (Berlin, Germany)From weak to strong coupling: quasi-BIC metasurfaces for mid-infrared light-matter interactions.PMC11245121R21 EB034411Rosas SYesilkoy FBiswas SKBeisenova AArvelo ERAdi WfalseFrom weak to strong coupling: quasi-BIC metasurfaces for mid-infrared light-matter interactions.Thanks to their giant, yet tunable, <i>Q</i>-factor resonances, all-dielectric metasurfaces supporting the quasi-bound states in the continuum (q-BIC) resonances are well-suited to provide a promising platform for quantum-coherent light-matter interactions. Yet, the strong coupling regime, characterized by the hybrid light-matter states - polaritons, has not yet been fully explored in the mid-infrared regime. This paper investigates the parameter space of vibrational strong coupling (VSC) between material and metasurface cavities supporting q-BIC resonances in the mid-infrared spectral range. We outline the effects of transition dipole strength, damping rate, and the number of molecules coupled to a single cavity, as well as the cavity damping rates, to understand their respective impacts 2024-01-01T00:00:00Z2024 Jul2025-04-18T12:52:49.454Z2025-02-19T02:34:39.199ZS-EPMC112451213900613710.1515/nanoph-2024-0043