Ontology highlight
ABSTRACT:
SUBMITTER: Farrell AC
PROVIDER: S-EPMC4667247 | biostudies-literature | 2015 Dec
REPOSITORIES: biostudies-literature
Scientific reports 20151202
Avalanche photodiodes (APDs) are essential components in quantum key distribution systems and active imaging systems requiring both ultrafast response time to measure photon time of flight and high gain to detect low photon flux. The internal gain of an APD can improve system signal-to-noise ratio (SNR). Excess noise is typically kept low through the selection of material with intrinsically low excess noise, using separate-absorption-multiplication (SAM) heterostructures, or taking advantage of ...[more]