Unique features of terahertz (THz) wave have made THz spectroscopy a potential and ideal tool for spectroscopy analysis. When a conventional THz spectroscopy system is used to measure a sample with birefringence, sometimes it is highly possible to misinterpret a polarization filter effect as normal spectral absorption, thus leads to a wrong identification and conclusion. Polarimetric terahertz spectroscopy (PTS) is one kind of newly emerged technology upgraded from conventional terahertz spectroscopy, in addition to all the traditional functions, it is able to automatically measure additional state of polarization of THz wave, as well as additional polarization information of samples. Here in this article we will comprehensively review the principle and progress of such PTS technology.

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极化太赫兹光谱学评论

太赫兹（THz）波的独特功能使THz光谱学成为光谱分析的潜在和理想工具。当使用常规的太赫兹光谱系统测量具有双折射的样品时，有时极有可能将偏振滤光片效应误解为正常的光谱吸收，从而导致错误的识别和结论。极化太赫兹光谱法（PTS）是从常规太赫兹光谱法升级而来的一种新兴技术，除具有所有传统功能外，它还能够自动测量THz波极化的附加状态以及样品的附加极化信息。在本文中，我们将全面回顾这种PTS技术的原理和进展。