Expérimental
Since their first synthesis in 2015, perovskite nanocrystals have attracted much attention due to their easy and cheap large-scale fabrication, and excellent optical properties for optoelectronics and quantum optics applications. A key breakthrough occurred in 2018 when superfluorescence was observed in superlattices of CsPbBr3 nanocrystals at low temperatures. Superfluorescence, a phenomenon where emitters synchronize through their long-range interaction and emit a burst of coherent light, had previously been limited to atoms and a few solid-state systems due to the difficulty of obtaining identical individual emitters at high densities within a superstructure. Perovskite nanocrystals, with their narrow size dispersion, provide an ideal material for creating superlattices that can achieve this effect. Integrating these superlattices into optimized optical microcavities is also crucial for enhancing superfluorescence through cavity quantum electrodynamics effects. In the Nano-optics group, a fibered Fabry-Perot microcavity was designed to enhance the emission of solution-processed nanoemitters. The goal of the project is to couple perovskite nanocrystal superlattices to this microcavity and study the superfluorescence in free space and cavity configurations. Enhanced dipole-dipole coupling within the cavity is expected to involve more nanocrystals in the superfluorescence, leading to increased emission.