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.