Cavity‐Enhanced Superfluorescence Stimulates Coherent Energy Transfer in a Perovskite Quantum Dot Superlattice

The exploration of cooperative states in many‐body systems is a key research area. It focuses on superfluorescence (SF), a phenomenon linked with radiative dipole coupling, and its intersection with classical lasing effects. This produces a unique lasing‐field‐hybrid cooperative dipole (LCD) state through optical cavity‐enhanced superfluorescence (CESF). A coherent energy transfer is demonstrated between two such states within a perovskite quantum dot (QD) superlattice. This results in competitive luminescence timing dynamics. The findings reveal that stimulated energy transfer occurs when two cooperative cavity‐exciton states coexist, controllable via a dual‐pulse pump technique. This understanding is vital for advancing quantum phenomena knowledge and enhancing optoelectronic devices. The energy transfer in a perovskite QD superlattice. The superfluorescence triggers energy transfer between LCD states, causing competitive luminescence dynamics. This is significant as it shows that stimulated energy transfer occurs when cooperative exciton states coexist in an optical cavity, which can be interpreted as stimulated Raman scattering.