Detecting a small signal in photo thermoreflectance measurement

Wen Feng Bu; Xing Hua Zheng; Da Wei Tang; Zhao Liang Wang; Guang Hua Cheng

Detecting a small signal in photo thermoreflectance measurement

Wen Feng Bu, Xing Hua Zheng, Da Wei Tang, Zhao Liang Wang, Guang Hua Cheng

科研成果: 期刊稿件 › 文章 › 同行评审

摘要

Introduce the principle of photo thermoreflectance technique in sub-surface imaging of thermal properties. Study the dominating noise. Fulfill the experiments by filtering the noise coming from the lasers by combining a bandpass filter and a differential detector. By narrowing the bandwidth of the signal and amplifying it by a lock-in amplifier, the fluctuating components of the signal can be shown on an oscillograph with lock-in amplifier.

源语言	英语
页（从-至）	71-74
页数	4
期刊	Shanghai Ligong Daxue Xuebao/Journal of University of Shanghai for Science and Technology
卷	30
期	1
出版状态	已出版 - 2月 2008
已对外发布	是

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KW - Thermal properties

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Detecting a small signal in photo thermoreflectance measurement

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