Fenómenos de acoplamiento fuerte colectivo entre semiconductores con estructura perovskita y modos de cavidad óptica

Abstract

The coherent coupling of light and matter gives rise to the so-called strong coupling phenomenon, resulting in new hybrid light-matter states called polaritons. A simple structure to observe strong coupling consists of two plane-parallel mirrors with an absorbing material in between, forming an optical cavity resonant with the emission wavelength of the emitting material inside the cavity. Hybrid halide peovskites are now considered a promising material for optoelectronics, due to their superior absorption, emission and charge transport properties. On this point, low dimensional perovskite single crystals displaying size con nement show great potential. Strong coupling has been recently studied for bulk hybrid inorganic-organic perovskite (CH3NH3PbBr3) and allinorganic perovskite (CsPbBr3) in the plane-parallel con guration. However, low dimensional perovskite single cristals have been less explored. In this work, a newly developed simple method is used to theoretically analyze the e ect of enclosing perovskite quantum dots inside Fabry-P erot cavities. Strong coupling with CH3NH3PbBr3 nanocrystals grown inside a porous silica matrix is predicted from simulation using Transfer Matrix Method. A Rabi splitting of 79 meV is anticipated for concentrations of quantum dots above 30% of the active material inside the matrix. Finally, we try to experimentally reproduce the calculated conditions, obtaining high quality cavities, but failing to recreate active lms with the desired characteristics.