Optical crosstalk of HgCdTe PV linear array detector
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摘要: 针对MCT红外焦平面阵列器件普遍存在的光串扰问题进行研究，从器件内部结构上，建立了线阵器件理论计算模型，并基于载流子连续性方程，利用Comsol软件对光串扰的大小进行了数值定量计算，研究了不同探测器结构尺寸、温度和材料等参数对光串扰的影响;从器件外部结构上，利用几何光学，研究了外部光学结构对光串扰的影响。研究结果表明，器件内部的衬底外延层厚度与器件外部的真空层对光串扰的影响最大，为今后红外焦平面器件结构的改进提供了一定的理论指导。Abstract: The optical crosstalk of MCT infrared focal plane arrays is studied in a systematic way. Considering detectors different structure and material parameters, including the external optical structure, temperature, pixel size, epitaxial thickness, minority carrier lifetime, and absorption coefficient, the amplitude of optical crosstalk are calculated. Results show that the thickness of substrates epitaxial layer in the internal structure and the vacuum layer in the external optical structure are the major influencing factors for the amplitude of optical crosstalk.
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Key words:
- hgcdte /
- linear array detector /
- comsol code /
- optical crosstalk
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