Emerging concepts employing angular momentum of THz light for ultrafast material control rely on the measurement of undistorted intense THz fields and on the precise knowledge about sophisticated THz helicity states. Here, we establish z-cut \alpha$\alpha$-quartz as a precise electro-optic THz detector for full amplitude, phase, and polarization measurement of highly intense THz fields, all at a fraction of costs of conventional THz detectors. We experimentally determine its detector response function, in excellent agreement with our modeling. Thereupon, we develop a swift and reliable protocol to precisely measure arbitrary THz polarization and helicity states. This two-dimensional electro-optic sampling in \alpha$\alpha$-quartz fosters rapid and cost-efficient THz time-domain ellipsometry and enables the characterization of polarization-tailored fields for driving chiral or other helicity-sensitive quasi-particles and topologies.

中文翻译：

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石英作为精确的高场低成本太赫兹螺旋度探测器

利用太赫兹光的角动量进行超快材料控制的新兴概念依赖于对不失真的强太赫兹场的测量以及对复杂太赫兹螺旋态的精确了解。在这里，我们将 z 切α-$\alpha$石英建立为一种精确的电光太赫兹探测器，用于高强度太赫兹场的全振幅、相位和偏振测量，而成本只是传统太赫兹探测器的一小部分。我们通过实验确定了其探测器响应函数，与我们的模型非常一致。因此，我们开发了一种快速可靠的协议来精确测量任意太赫兹偏振和螺旋态。这种α-$\alpha$石英中的二维电光采样促进了快速且经济高效的太赫兹时域椭圆光度测量，并能够表征偏振定制场以驱动手性或其他螺旋性敏感的准粒子和拓扑。