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256元InGaAs线列红外焦平面及扫描成像

Keywords: 探测器,焦平面,InGaAs,钝化,扫描成像

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Abstract:

报道了用分子束外延(MBE)方法生长掺杂InGaAs的PINInP/InGaAs/InP外延材料,通过台面制作、硫化处理、ZnS/聚酰亚胺双层钝化、电极生长等工艺,制备了256元正照射台面InGaAs线列探测器,278K时平均峰值探测率为1.33×1012cmHz1/2W-1.测试了不同钝化方式探测器典型Ⅰ-Ⅴ曲线和探测率,硫化可以减小探测器暗电流,ZnS/聚酰亚胺双层钝化效果最好.并对ZnS/聚酰亚胺双层钝化InGaAs探测器进行了电子辐照研究.256元InGaAs探测器阵列与两个CTIA结构128读出电路互连并封装,在室温时,焦平面响应率不均匀性为19.3%.成功实现了室温扫描成像,图像比较清晰.

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