Single-Photon Detection

Single-photon detection is a technology that identifies individual particles of light, called photons. When light strikes a specialized sensor, it can trigger a response only if a photon is present, allowing highly sensitive measurement of extremely faint signals. This process is crucial in fields like quantum computing, medical imaging, and secure communications, where detecting even one photon matters. The sensors used are designed to be extremely sensitive, ensuring accurate recognition of individual photons without requiring bright or intense light sources.