Cavity-modified exciton dynamics in porphyrin nanorings

Strong coupling between light and matter can lead to polariton states that fundamentally reshape exciton dynamics in molecular systems without altering their chemical structure. In this work, we examine this phenomenon in synthetic porphyrin systems which are promising systems for studying exciton dynamics and energy transfer processes due to their structural similarity to natural light-harvesting complexes, focusing on cyclic meso-meso and butadiyne-linked porphyrin nanorings placed within a Fabry-Pérot optical microcavity. Using the hierarchical equation of motion (HEOM) approach, we explore how exciton-photon coupling can tune the dynamic properties of these porphyrin arrays, revealing polaritonic effects as a promising route for characterizing, tailoring, and enhancing light-harvesting mechanisms. Our findings underscore the potential for leveraging strong coupling interactions to dynamically modulate the exciton behavior across structures, informing future design strategies for artificial photosynthetic devices that capitalize on polaritonic control.