Light-matter interaction in strong coupling regime based on bound states in the continuum

Strong light-matter interactions have attracted significant research attention in recent years due to their fundamental importance in quantum physics and potential applications in quantum technologies. Quasi-bound states in the continuum (QBICs) have emerged as an exceptional platform for achieving strong coupling regimes, owing to their unique combination of ultrahigh quality (Q) factors and strong field localization capabilities. This review systematically and comprehensively assesses recent progress in QBIC-based strong coupling systems, including hybrid systems incorporating excitons, molecules, and other photonic modes. We further discuss the derived physical phenomena and practical applications enabled by these strong coupling effects across various material platforms. Finally, we provide perspectives on future research directions and potential developments in BIC-based exciton-polariton systems for next-generation quantum devices and technologies.