Protecting intercavity polaritons in strongly coupled cavities
Phys. Rev. Applied 24, 034078 – Published 29 September, 2025
DOI: https://doi.org/10.1103/bbvd-gv9t
Abstract
We theoretically design and experimentally demonstrate a mechanism to protect intercavity polaritons, a mixed light-matter excitation in strongly coupled optical cavities. This arises from the strategic design of the energy-level landscape, which provides a direct connection with the transparency window, typically discussed in the context of slow light. The protection manifests itself as a remarkable robustness of the intercavity polariton dispersion over a wide momentum range, uncompromised photon-exciton mixing, and spatial separation of its photonic and excitonic components. The consequent tunable heavy mass opens avenues for exploring and using this unique optical excitation in advanced photonics.
