Strong coupling of Bloch Surface Wave and excitons in nanostrucutred semiconductors

Strong coupling regime, where cavity resonances or surface propagating waves are hybridized with the excitonic transitions in semiconductors, gives rise to exciton-polariton quasi-particles that have recently attracted much... [ view full abstract ]

Strong coupling regime, where cavity resonances or surface propagating waves are hybridized with the excitonic transitions in semiconductors, gives rise to exciton-polariton quasi-particles that 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.