We report on a time-domain polarimetry (TDP) system for generating and detecting broadband terahertz (THz) waves of different polarization angles. We generate THz waves from two-color laser filaments and determine their polarization states with a detection bandwidth of up to 8 THz using a spinning gallium phosphide crystal. The polarization of THz emission can be controlled by adjusting the position and tilt angle of the β-barium borate crystal. We characterize the precision of this system for polarimetric measurements at fixed time delay to be [Formula: see text] and [Formula: see text] for complete time-domain waveforms. We also demonstrate the feasibility of our TDP system by measuring broadband optical properties of anisotropic samples in both transmission and reflection geometries. The THz-TDP technique can be easily integrated in conventional THz time-domain spectroscopy setups using nonlinear crystal detectors.

中文翻译：

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基于空气等离子体灯丝发射和 GaP 中旋转电光采样的宽带太赫兹时域偏振法

我们报告了用于生成和检测不同偏振角的宽带太赫兹 (THz) 波的时域偏振测量 (TDP) 系统。我们从双色激光灯丝产生太赫兹波，并使用旋转的磷化镓晶体以高达 8 THz 的检测带宽确定它们的偏振态。可以通过调整β-硼酸钡晶体的位置和倾角来控制太赫兹发射的偏振。我们将此系统在固定时间延迟下进行极化测量的精度表征为 [公式：见文本] 和 [公式：见文本] 以获得完整的时域波形。我们还通过测量透射和反射几何中各向异性样品的宽带光学特性来证明我们的 TDP 系统的可行性。