AVALANCHE LIGHT DETECTOR

摘要

PURPOSE: An avalanche light detector is provided to compensate for a low light absorption rate and to decrease a breakdown voltage, by using an avalanche gain structure layer at least two times and by using a low voltage. CONSTITUTION: The avalanche light detector has an emitter light absorption layer structure between a collector layer and an emitter layer which are stacked on a substrate(S). The avalanche gain structure layer composed of a charge layer(103), a charge multiplication layer(104) and an electrode contact layer(105) is formed between the light absorption layer and the collector layer.