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首页> 外文期刊>Microelectronic Engineering >Noise and specific detectivity of pyroelectric detectors using lead titanate zirconate (PZT) thin films
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Noise and specific detectivity of pyroelectric detectors using lead titanate zirconate (PZT) thin films

机译：钛酸锆锆（PZT）薄膜热释电探测器的噪声和比探测

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摘要

Pyroelectric infrared detectors using sol-gel deposited lead zirconate titanate (PZT) thin films were fabricated. It was found that specific detectivity D~* of the detector is a strong function of the modulation frequency of the incident radiation. Noise plays an important role at low frequencies (< 20 Hz). When the modulation frequency is low ( < 10 Hz), the noise is dominated by 1/f noise. Johnson noise dominates the noise at frequencies higher than 10 Hz. This characteristic can be clearly seen from the noise-frequency spectrum. A one-dimensional heat conduction theoretical model was used to simulate the dynamic responses of the pyroelectric IR detector. The simulated results fitted quite well with the experimental results. D~* of the detector was predicted with the assumption that the Johnson noise was the dominating noise source.
机译：制备了使用溶胶-凝胶沉积锆钛酸铅（PZT）薄膜的热释电红外探测器。发现检测器的比检测率D〜*是入射辐射的调制频率的强函数。在低频（<20 Hz）下，噪声起着重要的作用。当调制频率低（<10 Hz）时，噪声以1 / f噪声为主。在高于10 Hz的频率下，约翰逊噪声占主导地位。从噪声频谱可以清楚地看出这一特性。使用一维热传导理论模型来模拟热释电红外探测器的动态响应。模拟结果与实验结果非常吻合。在假设约翰逊噪声是主要噪声源的前提下预测了检测器的D〜*。

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