Chiral superfluorescence from perovskite superlattices at room temperature

Researchers demonstrated chiral superfluorescence from perovskite superlattices at room temperature on June 3, 2026. This phenomenon involves the emission of circularly polarized light from a collection of atoms or molecules that are strongly coupled to a light field, resulting in a superradiant burst of light. The study, published in Nature, highlights that the intensity and polarization of this emission can be precisely controlled using weak magnetic fields. This breakthrough is significant because superfluorescence typically requires cryogenic temperatures, and achieving it at room temperature opens up new possibilities for optical devices and quantum technologies. The perovskite superlattices used in the experiment were engineered to exhibit specific chiral properties, meaning they are non-superimposable on their mirror images, which is crucial for generating circularly polarized light. The ability to tune the emission with magnetic fields suggests potential applications in magnetic sensing and optical switching.