Amplification of strong coupling by surface plasmon in a hybridized perovskite

• 1、School of Physics, Beijing University of Posts and Telecommunications, Beijing 100876, China

Abstract：This work reports a strong light-matter interaction in a sandwich structure composed of hybridized inorganic-organic perovskite nanowires, silica (SiO2) films, and a silver (Ag) film. Surface plasmon effectively enhances the strong exiton-photon coupling phenomenon, which depends on hybridized modes to reduce the dissipation of the whole system. By caculation it is found that the thickness of SiO2 and Ag films can affect the coupling strength. With the suitable parameters of the SiO2 (5 nm) and Ag (30 nm) films, Rabi splitting can reach 319 meV, while without a Ag film Rabi splitting is only 270 meV. Furthermore, Rabi splitting shows a linear relation with SiO2 film thickness within a limited range. Still, it has a nonlinear relation with Ag film thickness because the imaginary part of the effective index for the hybridized mode shows a nonlinear relation with Ag film thickness. The structure provides suitable parameters for the experiment and has potential application in nano-lasers.

Keywords： Surface Plasmon Perovskite Strong Coupling