Strong Coupling of Bloch Surface Wave and Excitons in Nanostrucutred Semiconductors

Strong light-matter coupling is achieved when a photonic mode is hybridized with the excitonic transitions in semiconductors, giving rise to exciton-polariton quasi-particles. These quasi-particles have recently attracted much interest for their fundamental and applied electro-optical properties. Here we show that with the strong coupling of Bloch Surface Wave and nanostructured semiconductor materials, exciton-polaritons can survive up to room temperature and show large nonlinearities. These results open the door to the investigation of new materials and nanostructures for room-temperature polariton devices and fundamental aspects of quantum fluids dynamics.