Quantum efficiency measurement

Quantum efficiency measurement assesses how effectively a device, like a photodetector, converts incoming light into an electrical signal. It’s expressed as a percentage indicating how many photons hitting the detector produce a usable electrical response. For example, if 100 photons hit the device and it generates a response equivalent to 80 photons, the quantum efficiency is 80%. This measurement helps evaluate the device’s sensitivity and performance, guiding improvements for applications such as imaging, communication, and scientific instrumentation. Essentially, higher quantum efficiency means better light-to-electrical signal conversion, enabling more accurate and efficient detection.