Passive quenching, signal shapes, and space charge effects in SPADs and SiPMs
Passive quenching, signal shapes, and space charge effects in SPADs and SiPMs
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SPAD 和 SiPM 中的无源猝灭、信号形状和空间电荷效应
DOI：
10.1016/j.nima.2022.167627
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
W. Riegler
中科院分区：
文献类型：
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作者：
Philipp Windischhofer;W. Riegler
在这篇报告中，我们研究了单光子雪崩二极管的被动猝灭动力学。我们的讨论是基于耦合到器件等效电路的电子-空穴雪崩的微观描述，该电路由失超电阻和结电容组成。从该模型出发，导出了简单电场结构下信号波形的解析表达式，并对实际器件几何形状给出了有效的数值描述。雪崩引起的空间电荷效应被包括在模拟中。它们会扭曲信号的形状，但既不会改变信号的基本特征，也不会改变其潜在的猝灭机制。
In this report we study the dynamics of passive quenching in a single-photon avalanche diode. Our discussion is based on a microscopic description of the electron–hole avalanche coupled to the equivalent circuit of the device, consisting of the quench resistor and the junction capacitance. Analytic expressions for the resulting signal shape are derived from this model for simple electric field configurations, and efficient numerical prescriptions are given for realistic device geometries. Space charge effects arising from the avalanche are included using simulations. They are shown to distort the signal shape, but alter neither its basic characteristics nor the underlying quenching mechanism.