2006 · 56 citations · 2 references
EngineeringComputer EngineeringElectrical EngineeringMicroelectronicsOptoelectronicsRadiation DetectionDetector TechnologyOptical DetectorsPhotodetectorsRadar InstrumentationRadiation DetectorsSemiconductor DetectorsAvalanche Photodiode ArraysAvalanche Photodiode DetectorsAvalanche PhotodiodesDetector Array DesignPhotodiodesPixelated Detector ArraysSilicon PhotodiodesTier Structure Design
A 64 X 64 laser-radar (ladar) detector array with 50mum pixel size measures the arrival times of single photons using Geiger-mode avalanche photodiodes (APD). A 3-tier structure with active devices on each tier is used with 227 transistors, six 3D vias and an APD in each pixel. A 9b pseudorandom counter in the pixel measures time. Initial imagery shows 2ns time quantization
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