Strong exciton-photon coupling in a microcavity containing layered perovskite semiconductors

The authors have realized a Perot-Fabry microcavity containing a two-dimensional layered perovskite-type semiconductor, (C6H5C2H4-NH3)(2)PbI4, between a dielectric mirror and a metallic mirror. A strong coupling regime between the perovskite exciton and the confined photon mode has been evidenced at room temperature from angular-resolved reflectivity experiments. An anticrossing of 140 meV is observed between the excitonic and cavity modes. (C6H5C2H4-NH3)(2)PbI4 having a self-organized multiple quantum well structure, they have determined the oscillator strength per quantum well of this structure: 4x10(13) cm(-2), which is one order of magnitude higher than in conventional inorganic quantum wells. (c) 2006 American Institute of Physics.