APD ARRAYS: Geiger-mode APD arrays detect low light

摘要

Geiger-mode avalanche photodiode arrays overcome limitations of a single device, and can distinguish between multiple-photon and single-photon events. Solid-state photodetectors have evolved in their ability to detect low levels of light. Building upon silicon photodiodes, novel solid-state detectors have been developed to detect increasingly lower levels of light. The latest addition and most sensitive solid-state detector to date is the Geiger-mode avalanche-photodiode (APD) array, which is capable of detecting a single photon.