With ever increasing availability of terahertz fields, it is important to find suitable detection techniques without compromising the measured dynamic range. Electro-optic terahertz sampling techniques, which are commonly used to detect terahertz fields, exhibit over-rotation at high fields that limit the detection accuracy. Here we discuss a method to correct for over-rotation that put no limits on measured terahertz field strengths, while preserving the low field sensitivity. We further evaluate the induced polarizations at high terahertz fields and show how over-rotation can be corrected by simultaneously measuring the polarizations before and after the quarter wave plate.

中文翻译：

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电光采样和过度旋转对高场太赫兹检测的偏振效应

随着太赫兹场可用性的不断提高，重要的是找到合适的检测技术而不损害测得的动态范围。通常用于检测太赫兹场的电光太赫兹采样技术在高场处会出现过度旋转，从而限制了检测精度。在这里，我们讨论一种校正过旋转的方法，该方法在保持低场灵敏度的同时，对太赫兹场强没有任何限制。我们进一步评估了在太赫兹场产生的极化，并显示了如何通过同时测量四分之一波片之前和之后的极化来校正过旋转。