探测器
物理
碲化镉汞
光电子学
碲化镉光电
响应度
红外探测器
红外线的
光学
光电探测器
暗电流
材料科学
作者
Gregory R. Zengilowski,Craig W. McMurtry,Judith L. Pipher,Nicholas S. Reilly,William J. Forrest,Mario S. Cabrera,Meghan L. Dorn,Andre Wong,Amanda Mainzer
出处
期刊:Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series
日期:2020-12-13
卷期号:11454: 1145435-
被引量:1
摘要
The depletion region around each p-n junction in HgCdTe HAWAII-2RG detector arrays decreases in volume as charge is collected, causing the pixel capacitance to change continuously throughout an integration period. This changing capacitance manifests as a steadily decreasing measured signal rate while observing a constant flux. Ignoring this nonlinear response to signal accumulation can lead to underestimating the number of detected pho- tons by as much as 10%. Presented here are two methods, one simple and one complex, of measuring this signal nonlinearity and a theoretical framework behind a nonlinearity correction method. Additionally, experimental data are compared with simulations to explain methods to reduce noise in the nonlinearity measurement and identify deviations from the expected behavior that merit further study.
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