Electronics & Semiconductor
APD Avalanche Photodiode
APD Avalanche Photodiode (APD) is a highly sensitive semiconductor electronic device that exploits the photoelectric effect to convert light to electricity. APDs can be thought of as photodetectors that provide a built-in first stage of gain through avalanche multiplication. From a functional standpoint, they can be regarded as the semiconductor analog to photomultipliers. By applying a high reverse bias voltage, APDs show an internal current gain effect due to impact…
- Types
- Si-APD · InGaAs-APD · Others
- Applications
- Industrial · Medical · Mobility
5 editions23 December 2025