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Application of Capacitive Microstructures as Anti-Aliasing Filters for Terahertz Time-Domain Spectroscopy
Optoelectronics, Instrumentation and Data Processing Pub Date : 2020-01-01 , DOI: 10.3103/s8756699020010136
A. A. Rybak , N. A. Nikolaev , S. A. Kuznetsov , Sh.-H. Yang

This paper first considers an approach based on the application of high-performance capacitive microstructures as anti-aliasing filters for low-frequency (sub-terahertz) measurements in terahertz time-domain spectroscopy. The approach was tested in measurements of the spectra of reference samples — bandpass filters with central frequencies of 156 and 376 GHz and a bandwidth of ∼12%. It is shown that the spectrometer measurement time is decreased by a factor of up to 12 with an improvement in measurement accuracy due to the elimination of the long-term drift of the normalization signal. This approach is supposed to be used to increase the dynamic range and the spectrometer signal-to-noise ratio in the sub-terahertz region.

中文翻译:

电容微结构作为太赫兹时域光谱抗混叠滤波器的应用

本文首先考虑了一种基于应用高性能电容微结构作为抗混叠滤波器的方法,用于太赫兹时域光谱中的低频(亚太赫兹)测量。该方法在参考样本的光谱测量中进行了测试 - 带通滤波器的中心频率为 156 和 376 GHz,带宽约为 12%。结果表明,由于消除了归一化信号的长期漂移,光谱仪测量时间减少了多达 12 倍,测量精度提高。这种方法应该用于增加亚太赫兹区域的动态范围和光谱仪信噪比。
更新日期:2020-01-01
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