金属框结构对碲镉汞红外焦平面调制传递函数的影响  

Influence of Metal Frame Structure on Modulation Transfer Function of HgCdTe Infrared Focal Plane

作　　者：张瞳[1,2] 林春 陈洪雷[1] 孙常鸿[1] 林加木[1] 王溪[1,2] Zhang Tong;Lin Chun;Chen Honglei;Sun Changhong;Lin Jiamu;Wang Xi(Key Laboratory of Infrared Imaging Materials and Detectors, Shanghai Institute of Technical Physics of the Chinese Academy of Sciences, Shanghai 200083, China;University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院上海技术物理研究所中国科学院红外成像材料与器件重点实验室,上海200083 [2]中国科学院大学,北京100049

出　　处：《光学学报》2018年第5期17-21,共5页Acta Optica Sinica

基　　金：国家自然科学基金(61705247)

摘　　要：调制传递函数(MTF)值是表征碲镉汞(HgCdTe)红外探测器成像性能的重要参数。串音是减小探测器MTF值的主要因素之一。合理的器件结构设计可有效地抑制串音,从而提高器件MTF值。介绍了一种含金属框结构的HgCdTe红外焦平面探测器,该器件可有效吸收横向扩散光生载流子并减小器件的串音干扰。对含金属框结构的器件和无金属框结构的器件进行MTF测试及对比分析。测试结果表明,与无金属框结构的器件相比,含金属框结构的器件的MTF值得到显著提高。Modulation transfer function（MTF）value is an important parameter to characterize the imaging performance of mercury cadmium telluride（HgCdTe）infrared detector.Crosstalk is one of the major factors which degrade the MTF value of detector.The reasonable device structure design can effectively suppress crosstalk and improve the MTF value of the device.A HgCdTe infrared focal plane detector with metal frame structure is proposed,which can effectively absorb laterally diffused photo-carriers and suppress crosstalk.We also carry out measurement and analysis of the MTF of the detectors with and without metal frame structure.The experimental results indicate that,compared with the detector without metal frame structure,the detector with metal frame structure can effectively increase MTF value of detector.

关 键 词：探测器 调制传递函数 红外焦平面 金属框 串音 

分 类 号：TN215[电子电信—物理电子学]