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首页> 外文期刊>Sensors Journal, IEEE >A Study of Crosstalk in a $256 times 256$ Photon Counting Imager Based on Silicon Geiger-Mode Avalanche Photodiodes
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A Study of Crosstalk in a $256 times 256$ Photon Counting Imager Based on Silicon Geiger-Mode Avalanche Photodiodes

机译:基于硅Geiger模式雪崩光电二极管的 $ 256×256 $ 光子计数成像器的串扰研究

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摘要

We demonstrate a passive photon counting imager based on hybridization of back-illuminated silicon Geiger-mode avalanche photodiodes to an all-digital CMOS counting chip. Photon detection efficiencies in the 10%–20% are observed at visible wavelengths. The detection efficiency is currently limited by optical crosstalk that leads to elevation of dark count rates as the bias voltage on the photodiodes is increased. Both the time dependence of dark count activity during a gate time and the spatial structure of dark images were successfully explained using crosstalk-based models.
机译:我们展示了一种基于背照式硅盖革模式雪崩光电二极管与全数字CMOS计数芯片的混合的无源光子计数成像器。在可见波长处观察到的光子检测效率为10%–20%。当前,检测效率受到光学串扰的限制,随着光电二极管上偏置电压的增加,光学串扰会导致暗计数率的升高。使用基于串扰的模型,成功地解释了选通时间内暗计数活动的时间依赖性和暗图像的空间结构。

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