Exciton-Polaritons in Nanoscale Metal-Organic Frameworks: A Platform for the Reversible Modulation of Strong Light-Matter Coupling via the Chemical Environment

We demonstrate robust exciton-polariton formation in planar metallic optical cavities incorporating porphyrin-based Metal-Organic Framework (MOF) nanoparticles. Our fabrication strategy employs highly monodisperse fluorinated MOF nanoparticle monolayers, sequentially coated with transparent silicon dioxide nanoparticles, enabling precise control over film thickness while preserving MOF pore accessibility. This architecture ensures well-defined excitonic transitions and facilitates alignment of the…