基于Silvaco TCAD 三维数值模拟方法研究了小像元HgCdTe 红外焦平探测器的电串音。通过分析中心像元光生载流子纵向输运和横向输运与电串音的相关性，揭示了光生载流子横向扩散是造成小像元HgCdTe 红外焦平面探测器中电串音迅速增加的主要原因。对小像元HgCdTe 红外焦平电串音的抑制方法进行探讨，计算结果表明适当调整吸收层厚度和引入组分梯度能够有效抑制小像元HgCdTe 红外焦平面探测器中的电串音。本文的研究对小像元碲镉汞红外焦平面探测器的设计具有一定的指导意义。

Based on Silvaco’s Technology Computer Aided Design(TCAD) 3D numerical simulation, the electric-crosstalk in small pixel-pitch HgCdTe focal plane arrays (FPAs) are studied. The correlations between the longitudinal and transversal transport of photogenerated-carriers in center pixels and electric-crosstalk are analyzed. The methods used to suppress the electric-crosstalk are discussed. The results show that the lateral diffusion of photogenerated-carriers is the main cause for the rapid increase of the electric-crosstalk in small pixel-pitch HgCdTe infrared FPAs. Calculations show that adjusting the thickness of the absorption layer and introducing a component gradient can effectively suppress the electric-crosstalk of FPAs. The study of this paper has a guiding significance for the design of small pixel-pitch HgCdTe FPAs.