15个$μm$截止HgCdTe探测器阵列的天文特性
Characterization of a 15 $μm$ Cutoff HgCdTe Detector Array for Astronomy
摘要：
罗切斯特大学红外探测器小组正在与Teledyne成像传感器公司合作，为未来的太空任务开发HgCdTe 15 $μm$截止波长探测器阵列。为了达到15个$μm$截止波长的目标，我们采取了一个中间步骤，开发了4个$\sim$ 13个$μm$截止波长阵列，以确定为近地天体摄像机任务开发的广泛表征的10个$μm$截止波长探测器阵列中与增加截止波长有关的任何不可预见的影响。在罗切斯特大学的$\sim$ 13 $μm$截止波长碲镉汞阵列的表征，使我们能够确定关键的暗电流机制，限制这些碲镉汞探测器阵列的性能在不同的温度和偏置时，截止波长增加。我们目前的初始暗电流和深度测量的15 $μm$截止阵列，显示暗电流值两个数量级小，在大的反向偏置比预期从我们以前的最佳结构。
英文摘要：
The University of Rochester infrared detector group is working together with Teledyne Imaging Sensors to develop HgCdTe 15 $μm$ cutoff wavelength detector arrays for future space missions. To reach the 15 $μm$ cutoff goal, we took an intermediate step by developing four $\sim$13 $μm$ cutoff wavelength arrays to identify any unforeseen effects related to increasing the cutoff wavelength from the extensively characterized 10 $μm$ cutoff wavelength detector arrays developed for the NEOCam mission. The characterization of the $\sim$13 $μm$ cutoff wavelength HgCdTe arrays at the University of Rochester allowed us to determine the key dark current mechanisms that limit the performance of these HgCdTe detector arrays at different temperatures and bias when the cutoff wavelength is increased. We present initial dark current and well depth measurements of a 15 $μm$ cutoff array which shows dark current values two orders of magnitude smaller at large reverse bias than would be expected from our previous best structures.
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