This paper presents a novel design for single-shot terahertz polarization detection based on terahertz time-domain spectroscopy (THz-TDS). Its validity has been confirmed by comparing its detection results with those of the THz common-path spectral interferometer through two separate measurements for the orthogonal components. Our results also show that its detection signal-to-noise ratios (SNRs) are obviously superior to those of the 45° optical bias THz-TDS by electro-optical sampling due to its operation on common-path spectral interference rather than the polarization-sensitive intensity modulation. The setup works without need of any optical scan, which does not only save time, but also efficiently avoids the disturbances from the fluctuations of the system and environment. Its single-shot mode allows it to work well for the applications with poor or no repeatability.

中文翻译：

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基于太赫兹时域光谱的单次太赫兹偏振检测

本文提出了一种基于太赫兹时域光谱（THz-TDS）的单次太赫兹偏振检测的新设计。通过对正交分量的两次单独测量，将其检测结果与太赫兹共径光谱干涉仪的检测结果进行比较，证实了其有效性。我们的结果还表明，其检测信噪比 (SNR) 明显优于电光采样的 45° 光偏置 THz-TDS，因为它在共路径光谱干涉而不是偏振-灵敏的强度调制。该设置无需任何光学扫描即可工作，不仅节省时间，还有效避免了系统和环境波动的干扰。