Superlattices and Ultrafast Dynamics

Nanocrystal superlattices, are ordered arrays of nanocrystals achieved through self-assembly process. The superlattices of halide perovskite nanocrystals exhibit new collective optical properties emerging only in these highly ordered assemblies.  Collective light emission from perovskite nanocrystal superlattices is influenced by dipole–dipole interactions between neighboring excitons of simultaneously excited nanocrystals. This dipole–dipole coupling changes the collective emission energy and rate compared to the emission of uncoupled nanocrystals. Our vision is to use these emerging collective optical properties to achieve coherent emission sources for quantum applications.