Use the photoelectric effect to eject electrons into a vacuum, multiplying them for high sensitivity.
Generate a voltage or current when internal p-n junctions absorb light. radiometry and the detection of optical radiation boyd pdf
Broad, flat spectral response (they respond equally to all wavelengths) but generally exhibit slower response times and lower sensitivity compared to photon counters. 2. Photon (Quantum) Detectors Use the photoelectric effect to eject electrons into