The Purcell Effect

The Purcell effect describes how an atom or quantum emitter's ability to emit light can be enhanced or suppressed by its surrounding environment, such as a specially designed cavity or resonator. When placed inside a resonant structure that matches its emission frequency, the emitter's light emission rate increases because the environment boosts the electromagnetic field at that frequency. Conversely, certain environments can also inhibit emission. This phenomenon is important in developing efficient lasers, quantum computers, and advanced sensors, as it allows scientists to control and optimize light-matter interactions at the quantum level.