Single-photon imaging in CMOS

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Abstract

We report on the architectural design and fabrication of medium and large arrays of single-photon avalanche diodes (SPADs) for a variety of applications in physics, medicine, and the life sciences. Due to dynamic nature of SPADs, designs featuring a large number of SPADs require careful analysis of the target application for an optimal use of silicon real estate and of limited readout bandwidth. This paper describes the main trade-offs involved in architecting such chips and the solutions adopted with focus on scalability and miniaturization.

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