Purcell

The Purcell effect describes how an emitter, like an atom or quantum dot, can have its energy emission rate altered by its surrounding environment. When placed inside a tailored optical cavity or nearby nanostructure, the emitter's interaction with light can be enhanced or suppressed. This means it can emit photons faster or slower than it would in free space. The effect is important in developing efficient light sources, quantum computers, and sensors, as it allows precise control over how and when an emitter releases light, optimizing their performance for various technological applications.