Thz detection using stokes-mueller polarimetry (phase 1)

目前的提案旨在改进并从而提高INRS开发的用于表征太赫兹（THz）辐射的新知识产权的价值，该知识产权基于斯托克斯-穆勒偏振测量法。太赫兹辐射源和探测器在光谱学、探测和安全等领域有着重要的应用前景。为了测量太赫兹电场的空间和时间分布，已经提出并证明了各种方法。其中，电光（EO）采样方法被广泛用于太赫兹时域光谱（THz-TDS），由于其相对简单的物理和宽的带宽。然而，EO方法具有若干缺点。我们的太赫兹探测技术，使用斯托克斯-米勒形式主义有几个优势，比传统的EO采样方法。首先，通过完全测量探测光束的斯托克斯参数，我们的技术解决了过度旋转的问题，从而允许具有潜在的无限动态范围的测量。其次，我们的技术也允许太赫兹偏振态的测量。第三，我们的技术可以提供时间和空间分布的太赫兹电场与一个单一的测量。此外，通过消除任何机械运动元件，大大提高了稳定性。在这个创新的想法项目中，我们建议开发一种基于我们发明的设备的工作原型，该设备可以进行太赫兹电场和极化的2D测量，具有非常大的动态范围。该项目的成功实施可能会产生一种独特的THz检测设备，为加拿大制造业在快速增长的THz市场中提供极具竞争力的产品。

The current proposal aims to improve and thus increase the value of a new intellectual property developed at the INRS for characterizing terahertz (THz) radiation, based on Stokes-Mueller polarimetry. THz sources and detectors have many important potential applications in the areas of spectroscopy, detection, and security. Various methods have been proposed and demonstrated in order to measure the spatial and temporal profile of the THz electric field. Among these, the electro-optic (EO) sampling method is widely used for THz time-domain spectroscopy (THz-TDS), due to the relatively straightforward physics involved and its wide bandwidth. However, the EO method suffers from several drawbacks. Our THz detection technique using Stokes-Mueller formalism has several advantages over the conventional EO-sampling method. First, by fully measuring the Stokes parameters of the probe beam, our technique solves the problem of over-rotation, thus allowing measurements with potentially unlimited dynamic range. Second, our technique also allows the measurement of the THz polarization state. Third, our technique can provide both temporal and spatial distribution of the THz electric field with a single measurement. Further, stability is greatly increased by eliminating any mechanically moving element.In this Idea to Innovation project, we propose to develop a working prototype of an equipment based on our invention, which could perform 2D measurement of both the THz electric field and polarization, with very large dynamic range. The successful implementation of this project could result in a unique equipment for THz detection, providing the Canadian manufacturing sector with a highly competitive product in the rapidly growing THz market.